Who bills the most Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101) to Medicare in California?
Medicare Part B FFS · CY2024 · as published by CMS163 physician groups billed Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101) to Medicare fee-for-service in California in 2024; the top five named groups hold 27% of that volume, and independent (non-hospital-affiliated) groups deliver 1%.
G0101 — Cervical or vaginal cancer screening; pelvic and clinical breast examination · Source: CMS Medicare Physician & Other Practitioners PUF (Part B), CY2024 release. Medicare fee-for-service only.
Snapshot covers the whole California market — the table below shows the top 100 groups (free tier).
Medicare fee-for-service covers 49% of Medicare in California; Medicare Advantage penetration 45% → 51% since 2020.
| # | Physician group | City | St | Specialty | Providers | G0101 svcs | Share* | Phone |
|---|---|---|---|---|---|---|---|---|
| 1 | SUTTER BAY MEDICAL FOUNDATION | PALO ALTO | CA | INTERNAL MEDICINE | 3716 | 2,148 | 4.7% | (415) 600-1020 |
| 2 | HOAG CLINIC | NEWPORT BEACH | CA | PHYSICIAN ASSISTANT | 436 | 1,542 | 3.4% | (949) 791-3370 |
| 3 | SUTTER VALLEY MEDICAL FOUNDATION | SACRAMENTO | CA | DIAGNOSTIC RADIOLOGY | 2420 | 1,521 | 3.4% | (916) 681-8852 |
| 4 | EISENHOWER MEDICAL CENTER | RANCHO MIRAGE | CA | NURSE PRACTITIONER | 457 | 1,456 | 3.2% | (760) 340-3911 |
| 5 | UNIVERSITY HEALTHCARE ALLIANCE | PLEASANTON | CA | INTERNAL MEDICINE | 332 | 1,203 | 2.7% | (925) 462-7060 |
| 6 | SCRIPPS HEALTH | LA JOLLA | CA | PHYSICIAN ASSISTANT | 1431 | 820 | 1.8% | (858) 455-9100 |
| 7 | REGENTS UNIV OF CALIFORNIA UCSF | SAN FRANCISCO | CA | PHYSICIAN ASSISTANT | 277 | 799 | 1.8% | (415) 476-1000 |
| 8 | DIGNITY HEALTH MEDICAL FOUNDATION | FOLSOM | CA | DIAGNOSTIC RADIOLOGY | 1197 | 748 | 1.7% | (916) 983-7476 |
| 9 | PROVIDENCE MEDICAL FOUNDATION | FULLERTON | CA | PHYSICIAN ASSISTANT | 1455 | 735 | 1.6% | (714) 871-3006 |
| 10 | BASS MEDICAL GROUP | WALNUT CREEK | CA | OTOLARYNGOLOGY | 318 | 708 | 1.6% | — |
| 11 | KARIE MCMURRAY MD INC A MEDICAL CORPORATION | THOUSAND OAKS | CA | NURSE PRACTITIONER | 2 | 699 | 1.5% | (805) 371-4708 |
| 12 | UCSF HEALTH MEDICAL FOUNDATION | REDWOOD CITY | CA | OBSTETRICS/GYNECOLOGY | 39 | 654 | 1.4% | (650) 701-1882 |
| 13 | PROHEALTH PARTNERS, A MEDICAL GROUP | LONG BEACH | CA | INTERNAL MEDICINE | 228 | 551 | 1.2% | (562) 495-4952 |
| 14 | CEDARS-SINAI MEDICAL CARE FOUNDATION | LOS ANGELES | CA | PHYSICIAN ASSISTANT | 1699 | 520 | 1.1% | (310) 423-0674 |
| 15 | PACIFIC CENTRAL COAST HEALTH CENTERS | SANTA MARIA | CA | PHYSICIAN ASSISTANT | 249 | 513 | 1.1% | (805) 349-8514 |
| 16 | ADVENTIST HEALTH PHYSICIANS NETWORK | HANFORD | CA | NURSE PRACTITIONER | 651 | 506 | 1.1% | (559) 583-4695 |
| 17 | MEMORIALCARE MEDICAL FOUNDATION | LONG BEACH | CA | FAMILY PRACTICE | 549 | 492 | 1.1% | (562) 346-2222 |
| 18 | PROVIDENCE SAINT JOHNS MEDICAL FOUNDATION | SANTA MONICA | CA | PHYSICIAN ASSISTANT | 287 | 418 | 0.9% | (310) 829-6789 |
| 19 | PROVIDENCE FACEY MEDICAL FOUNDATION | MISSION HILLS | CA | FAMILY PRACTICE | 320 | 336 | 0.7% | (818) 365-9531 |
| 20 | COMMUNITY FOUNDATION MEDICAL GROUP | FRESNO | CA | PHYSICIAN ASSISTANT | 292 | 336 | 0.7% | — |
| 21 | REGENTS OF THE UNIVERSITY OF CALIFORNIA LOS ANGELES | SANTA MONICA | CA | OBSTETRICS/GYNECOLOGY | 80 | 312 | 0.7% | (310) 319-5098 |
| 22 | PACIFIC WOMENS OBSTETRICS AND GYNECOLOGY MEDICAL GROUP INC | SAN FRANCISCO | CA | OBSTETRICS/GYNECOLOGY | 8 | 302 | 0.7% | (415) 379-9794 |
| 23 | UCSF HEALTH MEDICAL FOUNDATION | SAN FRANCISCO | CA | PHYSICIAN ASSISTANT | 70 | 299 | 0.7% | (415) 964-4866 |
| 24 | PROVIDENCE MEDICAL INSTITUTE | TORRANCE | CA | INTERNAL MEDICINE | 339 | 297 | 0.7% | (310) 303-7496 |
| 25 | MONTEREY OBGYN MEDICAL GROUP INC | RANCHO MIRAGE | CA | OBSTETRICS/GYNECOLOGY | 3 | 295 | 0.7% | (760) 779-5511 |
| 26 | SANSUM CLINIC | SANTA BARBARA | CA | INTERNAL MEDICINE | 322 | 287 | 0.6% | (805) 681-7500 |
| 27 | DRS HYMAN AND TIO A PARTNERSHIP FOR WOMENS HEALTH | AGOURA HILLS | CA | OBSTETRICS/GYNECOLOGY | 2 | 283 | 0.6% | (818) 932-0728 |
| 28 | PIH HEALTH PHYSICIANS | WHITTIER | CA | INTERNAL MEDICINE | 606 | 281 | 0.6% | (562) 698-0811 |
| 29 | LPCH MEDICAL GROUP DIV OF LUCILE | PALO ALTO | CA | PEDIATRIC MEDICINE | 327 | 274 | 0.6% | (650) 498-7200 |
| 30 | MAREENI T STANISLAUS MD A MEDICAL CORPORATION | TEMPLETON | CA | NURSE PRACTITIONER | 3 | 253 | 0.6% | (805) 434-3000 |
| 31 | USC CARE MEDICAL GROUP INC | LOS ANGELES | CA | DIAGNOSTIC RADIOLOGY | 1374 | 240 | 0.5% | (800) 872-2273 |
| 32 | INCONTINENCE AND PELVIC SUPPORT INSTITUTE | MISSION VIEJO | CA | OBSTETRICS/GYNECOLOGY | 3 | 235 | 0.5% | (714) 364-4400 |
| 33 | P. GILL OBSTETRICS AND GYNECOLOGY MEDICAL GROUP, INC. | STOCKTON | CA | OBSTETRICS/GYNECOLOGY | 12 | 233 | 0.5% | (209) 466-8546 |
| 34 | WOMENS OBGYN | SANTA ROSA | CA | OBSTETRICS/GYNECOLOGY | 2 | 229 | 0.5% | (707) 575-1626 |
| 35 | HELEN HUYNH D O INC | ROSEMEAD | CA | OBSTETRICS/GYNECOLOGY | 2 | 225 | 0.5% | (626) 773-8900 |
| 36 | OBHG CALIFORNIA PC | LA MESA | CA | OBSTETRICS/GYNECOLOGY | 90 | 224 | 0.5% | (619) 740-6000 |
| 37 | ASSOCIATED OB GYN SPECIALISTS OF SANTA BARBARA | SANTA BARBARA | CA | OBSTETRICS/GYNECOLOGY | 2 | 210 | 0.5% | (805) 682-8166 |
| 38 | WHITNEY DIXON MD INC | CHICO | CA | NURSE PRACTITIONER | 3 | 209 | 0.5% | (530) 899-9616 |
| 39 | MONTAGE MEDICAL GROUP | MONTEREY | CA | FAMILY PRACTICE | 125 | 208 | 0.5% | (831) 718-9701 |
| 40 | LOS ANGELES HEMATOLOGY-ONCOLOGY MEDICAL GROUP | LOS ANGELES | CA | HEMATOLOGY/ONCOLOGY | 51 | 207 | 0.5% | (213) 977-1214 |
| 41 | TORRANCE HEALTH ASSOCIATION INC | TORRANCE | CA | FAMILY PRACTICE | 298 | 204 | 0.5% | (310) 257-7260 |
| 42 | RODEO MEDICAL GROUP | BEVERLY HILLS | CA | OBSTETRICS/GYNECOLOGY | 6 | 200 | 0.4% | (310) 432-6640 |
| 43 | ENLOE MEDICAL CENTER | CHICO | CA | DIAGNOSTIC RADIOLOGY | 362 | 199 | 0.4% | (530) 332-4470 |
| 44 | COMMUNITY MEMORIAL HEALTH SYSTEM | VENTURA | CA | FAMILY PRACTICE | 190 | 188 | 0.4% | (805) 652-5011 |
| 45 | REGENTS OF THE UNIVERSITY OF CALIFORNIA | SAN DIEGO | CA | DIAGNOSTIC RADIOLOGY | 2057 | 183 | 0.4% | (800) 926-8273 |
| 46 | WASHINGTON TOWNSHIP MEDICAL FOUNDATION | FREMONT | CA | CRITICAL CARE (INTENSIVISTS) | 120 | 182 | 0.4% | (510) 248-1000 |
| 47 | ROSE WOMEN'S HEALTH | ARCADIA | CA | OBSTETRICS/GYNECOLOGY | 2 | 181 | 0.4% | (626) 461-7071 |
| 48 | JOHN MUIR PHYSICIAN NETWORK | WALNUT CREEK | CA | FAMILY PRACTICE | 489 | 180 | 0.4% | (925) 296-9720 |
| 49 | SIMI OBSTETRICS AND GYNECOLOGY MEDICAL GROUP A MEDICAL CORP | SIMI VALLEY | CA | OBSTETRICS/GYNECOLOGY | 4 | 172 | 0.4% | (805) 527-8055 |
| 50 | LUDMILA B BESS MD A PROFESSIONAL CORPORATION | LOS ANGELES | CA | OBSTETRICS/GYNECOLOGY | 2 | 169 | 0.4% | 3239348877228 |
| 51 | RANCHO FAMILY MEDICAL GROUP INC | TEMECULA | CA | PHYSICIAN ASSISTANT | 104 | 168 | 0.4% | (951) 676-4193 |
| 52 | OBSTETRICS AND GYNECOLOGY MEDICAL GROUP OF VERDUGO HILLS | GLENDALE | CA | OBSTETRICS/GYNECOLOGY | 2 | 163 | 0.4% | (818) 790-8121 |
| 53 | SVMHS CLINICS | SALINAS | CA | PHYSICIAN ASSISTANT | 245 | 162 | 0.4% | (831) 422-3636 |
| 54 | WOMEN TO WOMEN OBGYN OF LOS ANGELES | LOS ANGELES | CA | OBSTETRICS/GYNECOLOGY | 2 | 159 | 0.4% | (323) 452-9655 |
| 55 | SO-CAL COMMUNITY HEALTH CENTER | ARLETA | CA | FAMILY PRACTICE | 2 | 151 | 0.3% | (818) 746-2626 |
| 56 | CHINESE HOSPITAL ASSOCIATION | SAN FRANCISCO | CA | INTERNAL MEDICINE | 34 | 142 | 0.3% | (415) 677-2370 |
| 57 | WEST COAST OB/GYN, INC. | SAN DIEGO | CA | OBSTETRICS/GYNECOLOGY | 14 | 140 | 0.3% | (858) 277-9378 |
| 58 | SELAH WOMEN'S HEALTH PC | REDDING | CA | OBSTETRICS/GYNECOLOGY | 4 | 138 | 0.3% | (530) 338-0002 |
| 59 | COMMUNITY HEALTH PARTNERS | FRESNO | CA | INTERNAL MEDICINE | 509 | 130 | 0.3% | (559) 459-6000 |
| 60 | VALLEY WOMEN'S HEALTHCARE MEDICAL GROUP INC | FRESNO | CA | OBSTETRICS/GYNECOLOGY | 2 | 128 | 0.3% | (559) 244-0133 |
| 61 | MACER MEDICAL | ROLLING HILLS ESTATES | CA | GENERAL PRACTICE | 3 | 120 | 0.3% | (310) 541-8400 |
| 62 | IGO MEDICAL GROUP AMC | SAN DIEGO | CA | OBSTETRICS/GYNECOLOGY | 11 | 117 | 0.3% | 8584551248145 |
| 63 | THE REGENTS OF THE UNIVERSITY OF CALIFORNIA | LOS ANGELES | CA | OBSTETRICS/GYNECOLOGY | 54 | 117 | 0.3% | (310) 794-7274 |
| 64 | EL CAMINO HEALTH MEDICAL NETWORK LLC | SAN JOSE | CA | PHYSICIAN ASSISTANT | 199 | 116 | 0.3% | (408) 871-3400 |
| 65 | EMANATE HEALTH MEDICAL CARE FOUNDATION | WEST COVINA | CA | FAMILY PRACTICE | 81 | 109 | 0.2% | (626) 732-8391 |
| 66 | ADVENTIST HEALTH CLEARLAKE HOSPITAL INC. | CLEARLAKE | CA | DIAGNOSTIC RADIOLOGY | 88 | 105 | 0.2% | (707) 994-6486 |
| 67 | ARROYO OAKS MEDICAL ASSOCIATES INC | THOUSAND OAKS | CA | INTERNAL MEDICINE | 11 | 100 | 0.2% | 80549510665000 |
| 68 | IMPERIAL VALLEY FAMILY CARE MEDICAL GROUP A P C | EL CENTRO | CA | FAMILY PRACTICE | 23 | 98 | 0.2% | (760) 353-6363 |
| 69 | HM MEDICAL INC A PROFESSIONAL MEDICAL CORP | NEWPORT BEACH | CA | OBSTETRICS/GYNECOLOGY | 2 | 92 | 0.2% | (949) 646-2800 |
| 70 | NEWPORT BEACH OB/GYN MEDICAL GROUP INC. | NEWPORT BEACH | CA | OBSTETRICS/GYNECOLOGY | 2 | 91 | 0.2% | (949) 642-5775 |
| 71 | H ELENA RODRIGUEZ MD INC | Torrance | CA | OBSTETRICS/GYNECOLOGY | 2 | 89 | 0.2% | — |
| 72 | DESILVA MEDICAL, INC. | PALMDALE | CA | INTERNAL MEDICINE | 2 | 88 | 0.2% | (661) 726-6255 |
| 73 | MARSHALL MEDICAL CENTER | PLACERVILLE | CA | PHYSICIAN ASSISTANT | 154 | 82 | 0.2% | — |
| 74 | STANFORD HEALTH CARE | STANFORD | CA | DIAGNOSTIC RADIOLOGY | 3039 | 79 | 0.2% | (650) 723-4000 |
| 75 | ASSOCIATES IN WOMENS HEALTH CARE | ROSEVILLE | CA | OBSTETRICS/GYNECOLOGY | 7 | 76 | 0.2% | — |
| 76 | ACACIA FAMILY MEDICAL GROUP | SALINAS | CA | FAMILY PRACTICE | 5 | 72 | 0.2% | (831) 663-0123 |
| 77 | CAPITAL OB/GYN, INC. | SACRAMENTO | CA | OBSTETRICS/GYNECOLOGY | 11 | 69 | 0.2% | (916) 920-2082 |
| 78 | PERMANENTE MEDICAL GROUP INC | SANTA CLARA | CA | INTERNAL MEDICINE | 10890 | 67 | 0.1% | (408) 851-1000 |
| 79 | MID-ATLANTIC WOMENS CARE PLC | NORFOLK | CA | OBSTETRICS/GYNECOLOGY | 153 | 67 | 0.1% | (757) 466-6350 |
| 80 | SAN DIEGO WOMENS HEALTH INC | LA JOLLA | CA | OBSTETRICS/GYNECOLOGY | 3 | 65 | 0.1% | (858) 677-0777 |
| 81 | LE, NGUYEN, TRAM, NGUYEN AND TRAN MEDICAL CORPORATION | WESTMINSTER | CA | INTERNAL MEDICINE | 4 | 64 | 0.1% | (714) 531-2220 |
| 82 | TORMED WOMENS MEDICAL GROUP INC | TORRANCE | CA | OBSTETRICS/GYNECOLOGY | 2 | 63 | 0.1% | (310) 326-5150 |
| 83 | LIZELLEN LA FOLLETTE MD INC | GREENBRAE | CA | OBSTETRICS/GYNECOLOGY | 2 | 61 | 0.1% | (415) 461-1949 |
| 84 | HEALTHCARE PARTNERS AFFILIATES MEDICAL GROUP | CARSON | CA | INTERNAL MEDICINE | 771 | 61 | 0.1% | (310) 830-9706 |
| 85 | BARTON MEDICAL FOUNDATION | SOUTH LAKE TAHOE | CA | PHYSICIAN ASSISTANT | 95 | 60 | 0.1% | (530) 539-6620 |
| 86 | OB-GYN PLACE A MEDICAL CORPORATION | ARCADIA | CA | OBSTETRICS/GYNECOLOGY | 2 | 58 | 0.1% | (626) 358-1970 |
| 87 | RIVERWAY MEDICAL GROUP A MEDICAL CORPORATION | VISALIA | CA | NURSE PRACTITIONER | 8 | 58 | 0.1% | (559) 372-7390 |
| 88 | CARE FOR WOMENS MEDICAL GROUP INC | UPLAND | CA | OBSTETRICS/GYNECOLOGY | 4 | 58 | 0.1% | (909) 355-7855 |
| 89 | KANWAR T MAHAL, MD INC. | FRESNO | CA | FAMILY PRACTICE | 2 | 50 | 0.1% | (559) 437-9100 |
| 90 | CENTRAL COAST FAMILY CARE MEDICAL ASSOCIATES INC | SANTA MARIA | CA | FAMILY PRACTICE | 9 | 50 | 0.1% | (805) 938-7444 |
| 91 | EMILY REKUC DO INC | LA QUINTA | CA | OBSTETRICS/GYNECOLOGY | 3 | 49 | 0.1% | (760) 777-4067 |
| 92 | BOLSA MEDICAL GROUP | WESTMINSTER | CA | FAMILY PRACTICE | 15 | 49 | 0.1% | (714) 531-2091 |
| 93 | RITA R ELLITHORPE MD INC | TUSTIN | CA | PHYSICIAN ASSISTANT | 6 | 48 | 0.1% | (714) 544-1521 |
| 94 | NEW YORK UNIVERSITY | NEW YORK | CA | DIAGNOSTIC RADIOLOGY | 5704 | 47 | 0.1% | (212) 263-9700 |
| 95 | CENTRAL CALIFORNIA FACULTY MEDICAL GROUP INC | FRESNO | CA | EMERGENCY MEDICINE | 252 | 46 | 0.1% | (559) 459-6000 |
| 96 | CALIFORNIA CARDIOVASCULAR CONSULTANTS | FREMONT | CA | INTERNAL MEDICINE | 29 | 45 | 0.1% | (510) 796-0222 |
| 97 | SHOBHANA GANDHI MD INC | LOS ANGELES | CA | OBSTETRICS/GYNECOLOGY | 3 | 45 | 0.1% | (323) 953-8821 |
| 98 | WYNN MEDICAL CENTER INTERNAL MEDICINE PASADENA | PASADENA | CA | INTERNAL MEDICINE | 2 | 44 | 0.1% | (626) 356-4000 |
| 99 | PARAGON PHYSICAL THERAPY AND REHAB LLC | BULLHEAD CITY | CA | ORTHOPEDIC SURGERY | 82 | 44 | 0.1% | — |
| 100 | MODERN WOMENS CARE | TORRANCE | CA | OBSTETRICS/GYNECOLOGY | 3 | 41 | 0.1% | 3105395060109 |
*Share of California's disclosed Medicare-FFS services for G0101, counted once per clinician. Volume is placed in the state it was billed from, so this page ranks the groups actually billing G0101 in California — including groups registered elsewhere ("City" is each group's registered location). Group figures sum clinicians affiliated with exactly one group; clinicians in several groups are listed in each group's drill-down but not volume-attributed to any single group.
How to read this. Figures are Medicare fee-for-service only — not all-payer — from the CMS Medicare Physician & Other Practitioners Public Use File (Part B), CY2024 release. CMS suppresses any provider×code row under 11 beneficiaries, so a missing group means "suppressed," never zero. "Charges" are provider-submitted amounts, not payments. Groups are ranked by measured service volume attributed to clinicians in exactly one group — clinicians affiliated with several groups are listed in rosters but never volume-attributed to a single group — a direct read of the public record, not a rating or quality score. Full method: Methods & Sources.
Comparing against an all-payer estimate?
These are exact counts from Medicare fee-for-service claims — roughly a third to half of most procedure markets, depending on payer mix. Modeled all-payer databases project the remainder statistically; we publish the audited floor and label it as such. Same market, different denominator. How the numbers reconcile →