Medicare · fee-for-service Part B

California — total Medicare claims by state

132.9M

Services billed

$5.5B

Medicare payments

7,342

Physician groups

9.2%

of the national total

650K

Inpatient discharges · FY2024

152.0M

Part D claims · CY2024

Physician groups in California billed 132,861,207 Medicare Part B services in 2024, totaling $5.5B in Medicare payments — 9.2% of the national total.

Calendar year 2024 · Medicare fee-for-service Part B

California billing by specialty

Physician groups billing in California, by primary specialty · CY2024

Primary specialty	Services	Medicare payments	Groups
Internal Medicine	21.9M	$961.6M	723
Diagnostic Radiology	18.8M	$671.7M	304
Family Practice	15.2M	$807.4M	846
Physical Therapist in Private Practice	12.7M	$279.5M	914
Hematology/Oncology	10.5M	$167.3M	45
Rheumatology	7.5M	$86.6M	38
Ophthalmology	7.2M	$495.1M	288
Dermatology	5.1M	$273.1M	281
Anesthesiology	3.6M	$152.3M	305
Orthopedic Surgery	3.6M	$118.9M	179
Cardiovascular Disease (Cardiology)	2.8M	$201.3M	188
Urology	2.2M	$51.8M	55
Neurology	2.0M	$43.6M	89
Otolaryngology	1.6M	$76.4M	65
Podiatry	1.5M	$104.7M	167
Emergency Medicine	1.5M	$125.1M	338
Nurse Practitioner	1.1M	$74.3M	87
Pathology	1.1M	$46.3M	92
Allergy/Immunology	1.1M	$19.7M	41
Gastroenterology	989K	$56.3M	97
Nephrology	965K	$88.1M	79
Physical Medicine and Rehabilitation	811K	$48.7M	53
Infectious Disease	650K	$18.2M	31
Optometry	629K	$47.0M	387
General Surgery	597K	$51.4M	129
Clinical Psychologist	581K	$36.8M	119
Pain Management	579K	$21.0M	41
Psychiatry	538K	$35.9M	178
Obstetrics/Gynecology	535K	$27.6M	98
General Practice	405K	$14.4M	67
Chiropractic	371K	$11.0M	233
Hematology	364K	$5.3M	2
Occupational Therapist in Private Practice	360K	$7.5M	61
Pulmonary Disease	337K	$30.4M	46
Radiation Oncology	303K	$37.1M	31
Hospitalist	298K	$26.0M	37
Medical Oncology	293K	$6.3M	5
Critical Care (Intensivists)	247K	$18.9M	29
Endocrinology	237K	$8.5M	20
Clinical Social Worker	202K	$12.8M	118
Vascular Surgery	179K	$28.7M	30
Interventional Cardiology	163K	$15.0M	12
Interventional Pain Management	135K	$6.7M	25
Marriage and Family Therapist	119K	$8.2M	46
Physician Assistant	108K	$28.2M	16
Cardiac Electrophysiology	88,863	$9.5M	9
Nuclear Medicine	73,671	$4.6M	1
Qualified Audiologist	73,470	$2.6M	55
Registered Dietitian or Nutrition Professional	68,876	$2.9M	13
Pediatric Medicine	67,909	$1.1M	16
Undefined Physician Type (Specify)	62,261	$1.9M	2
Neurosurgery	52,407	$6.7M	40
Geriatric Medicine	48,079	$2.3M	7
Interventional Radiology	45,018	$16.9M	7
Osteopathic Manipulative Medicine	34,319	$2.0M	6
Cardiac Surgery	33,879	$7.2M	10
Dentist	33,850	$368K	3
Sleep Medicine	33,353	$3.3M	13
Plastic and Reconstructive Surgery	27,493	$2.5M	23
Qualified Speech Language Pathologist	20,399	$536K	10
Hand Surgery	19,345	$979K	5
Certified Registered Nurse Anesthetist (CRNA)	14,986	$1.7M	41
Colorectal Surgery (Proctology)	10,822	$912K	8
Thoracic Surgery	10,810	$1.8M	10
Mental Health Counselor	2,483	$184K	11
Gynecological Oncology	2,206	$210K	2
Addiction Medicine	2,119	$129K	2
Surgical Oncology	2,031	$365K	1
Oral Surgery	1,696	$109K	6
Hospice/Palliative Care	1,295	$111K	4
Maxillofacial Surgery	170	$13K	2

Ranked by services billed. Each linked specialty opens its highest-billed code in California; when that code is not shown, it opens the specialty's own page.

California hospital inpatient by MS-DRG

Hospital inpatient stays in California, by MS-DRG · FY2024 (Oct–Sep)

MS-DRG	Discharges	Share of national
871 · SEPTICEMIA OR SEVERE SEPSIS WITHOUT MV >96 HOURS WITH MCC	71,080	12.3%
291 · HEART FAILURE AND SHOCK WITH MCC	26,744	8.7%
872 · SEPTICEMIA OR SEVERE SEPSIS WITHOUT MV >96 HOURS WITHOUT MCC	13,737	12.8%
177 · RESPIRATORY INFECTIONS AND INFLAMMATIONS WITH MCC	13,186	9.1%
193 · SIMPLE PNEUMONIA AND PLEURISY WITH MCC	12,601	9.1%
640 · MISCELLANEOUS DISORDERS OF NUTRITION, METABOLISM, FLUIDS AND ELECTROLYTES WITH MCC	10,006	12.9%
853 · INFECTIOUS AND PARASITIC DISEASES WITH O.R. PROCEDURES WITH MCC	8,734	10.5%
698 · OTHER KIDNEY AND URINARY TRACT DIAGNOSES WITH MCC	8,640	11.0%
280 · ACUTE MYOCARDIAL INFARCTION, DISCHARGED ALIVE WITH MCC	8,453	9.6%
690 · KIDNEY AND URINARY TRACT INFECTIONS WITHOUT MCC	8,161	8.5%
189 · PULMONARY EDEMA AND RESPIRATORY FAILURE	7,528	8.0%
392 · ESOPHAGITIS, GASTROENTERITIS AND MISCELLANEOUS DIGESTIVE DISORDERS WITHOUT MCC	7,386	8.1%
470 · MAJOR HIP AND KNEE JOINT REPLACEMENT OR REATTACHMENT OF LOWER EXTREMITY WITHOUT MCC	7,362	11.4%
689 · KIDNEY AND URINARY TRACT INFECTIONS WITH MCC	7,359	8.8%
682 · RENAL FAILURE WITH MCC	7,247	9.3%
378 · GASTROINTESTINAL HEMORRHAGE WITH CC	6,942	8.7%
064 · INTRACRANIAL HEMORRHAGE OR CEREBRAL INFARCTION WITH MCC	6,872	10.2%
683 · RENAL FAILURE WITH CC	6,738	8.2%
065 · INTRACRANIAL HEMORRHAGE OR CEREBRAL INFARCTION WITH CC OR TPA IN 24 HOURS	6,542	9.0%
641 · MISCELLANEOUS DISORDERS OF NUTRITION, METABOLISM, FLUIDS AND ELECTROLYTES WITHOUT MCC	6,423	9.6%
885 · PSYCHOSES	6,036	14.4%
377 · GASTROINTESTINAL HEMORRHAGE WITH MCC	5,813	10.5%
603 · CELLULITIS WITHOUT MCC	5,517	9.1%
481 · HIP AND FEMUR PROCEDURES EXCEPT MAJOR JOINT WITH CC	5,478	8.2%
190 · CHRONIC OBSTRUCTIVE PULMONARY DISEASE WITH MCC	4,808	8.7%

Top 25 of 725 MS-DRGs with published discharges in California, ranked by discharges. Share is this state's discharges against the DRG's national total (both from CMS's by-geography inpatient file, so a share never exceeds 100%). Each DRG opens its market for California. Discharges are counted stays under Medicare fee-for-service Part A (no Medicare Advantage), Maryland waiver-priced.

California Part D medications

Part D medications prescribed in California, by claims · CY2024

Medication	Claims	30-day fills	Share of national
Atorvastatin Calcium	7.8M	20.4M	10.7%
Amlodipine Besylate	5.0M	12.6M	10.0%
Losartan Potassium	3.9M	10.2M	10.8%
Levothyroxine Sodium	3.7M	9.1M	8.5%
Gabapentin	3.1M	5.2M	8.5%
Lisinopril	3.1M	8.1M	8.5%
Metformin Hcl	2.8M	7.0M	11.8%
Rosuvastatin Calcium	2.5M	6.6M	8.2%
Omeprazole	2.3M	5.0M	7.9%
Hydrocodone/Acetaminophen · Hydrocodone-Acetaminophen	2.2M	2.2M	11.1%
Metoprolol Succinate	2.2M	5.5M	6.9%
Tamsulosin Hcl	2.2M	5.1M	10.1%
Pantoprazole Sodium	1.9M	3.8M	7.4%
Furosemide	1.8M	3.6M	7.6%
Albuterol Sulfate · Albuterol Sulfate Hfa	1.7M	2.0M	9.3%
Apixaban · Eliquis	1.7M	2.9M	7.1%
Hydrochlorothiazide	1.6M	4.1M	8.5%
Trazodone Hcl	1.5M	2.7M	8.1%
Simvastatin	1.4M	3.7M	9.0%
Metoprolol Tartrate	1.3M	3.1M	8.4%
Famotidine	1.3M	2.6M	9.2%
Empagliflozin · Jardiance	1.3M	2.6M	11.3%
Carvedilol	1.3M	2.9M	8.1%
Alendronate Sodium	1.2M	3.0M	14.1%
Ibuprofen	1.2M	1.4M	17.3%

Ranked by claims: the 25 of 2,979 medications CMS publishes for California with the most claims in CY2024. Medications are shown as CMS prints them, at the brand-and-generic grain CMS publishes. Geography is the prescriber's state as CMS files it: claims are counted where the prescriber sits, not where the pharmacy or the patient is. A claim is one dispensed fill, refills included; it is not a prescription written and not a patient count. 30-day fills restate claims to a 30-day supply, so a 90-day fill counts as three. Share is this state's claims against the total CMS publishes for the medication nationally. Claims are Medicare Part D drug-plan claims, Medicare Advantage plans included. Drug cost and prescriber figures are not part of this page.

Figures are attributable Medicare billing: each service is credited to a physician group only when the clinician who billed it belongs to exactly one group in CMS's Doctors and Clinicians register. Clinicians registered with more than one group, and groups without a specialty label, are not included in the specialty table above.

The physician-billing figures are Medicare fee-for-service Part B, and the hospital inpatient figures Medicare fee-for-service Part A — Medicare Advantage is not included in these. The Part D medication claims are the exception: they are drug-plan claims and include Medicare Advantage drug plans. A county- or city-level total for California is not published here — see methods for why. Search a specific procedure code and state on the code browser for the ranked physician groups behind these totals.