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COLBY, JOHNMD, PHD NPI 1700205374 Clinician

Diagnostic Radiology · GREENBRAE, CA

Specialty Diagnostic Radiology — from billed Medicare claims
Trained UNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE — medical school, self-reported to CMS
In practice about 12 years since medical school (class of 2014, self-reported to CMS)
Location GREENBRAE, CA · NPPES registered location
Active in data Billed Medicare 2020–2024 (5 consecutive years)
Scale 95 codes billed · 9,433 disclosed services (CY2024 — most recent year in data)
Current groups
member of 2 groups; the volumes below are this clinician's personal volume and are not attributed to any single group

Group affiliation since 2019

20202026
PRIMA MEDICAL FOUNDATION
2021–2026
CALIFORNIA ADVANCED IMAGING MEDICAL ASSOCIATES INC
2020–2026

The roster archive begins in 2019, so a span starting at 2019 may reach back further. Membership spans only — no volume is attributed to any group here.

NPPES registry · CMS Doctors & Clinicians registry · Medicare Part B physician/supplier claims · NPPES record last updated 2020-07

Year: 2024 · 2023 · 2022  · 2021  · 2020 

Provider overview · all codes · CY2024

The full analytics for this provider

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The billed-volume positioning, practice focus, and economics behind this provider — computed on the same disclosed Medicare Part B data.

This provider's disclosed Medicare payments across all codes were in CY2024. Included with Platform.

  • Payment, service & beneficiary totals — the disclosed scale, all codes
  • Practice profile — focus & reach — top codes by share of services
  • Office vs. facility setting mix — place-of-service code split
  • Volume over five years — discrete yearly counts, no rate
  • Peer positioning — service volume — percentile among specialty peers, cohort & year disclosed
  • Peer positioning — code breadth — how many codes billed, vs peers

Peer positioning shows billed-volume and code-breadth positions among specialty peers, not measures of care (a provider's true volume position can only be higher, never lower). All figures disclosed Medicare Part B fee-for-service; volumes are personal to this NPI, not attributed to any group.

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Procedures billed to Medicare Part B (2024)

Medicare Part B FFS · CY2024 · as published by CMS
CodeDescription Services Beneficiary-episodes Avg charge Avg Medicare payment
71045 X-ray of chest, 1 view
70450 Ct scan head or brain without contrast
74177 Ct scan of abdomen and pelvis with contrast
73030 X-ray of shoulder, minimum of 2 views
73502 X-ray of hip, 2-3 views
73562 X-ray of knee, 3 views
70551 Mri scan of brain without contrast
73564 X-ray of knee, 4 or more views
72100 X-ray of lower and sacral spine, 2-3 views
71046 X-ray of chest, 2 views
70553 Mri scan of brain before and after contrast
72148 Mri scan of lower spinal canal without contrast
73630 X-ray of foot, minimum of 3 views
72110 X-ray of lower and sacral spine, minimum of 4 views
73130 X-ray of hand, minimum of 3 views
72125 Ct scan of upper spine without contrast
71260 Ct scan of chest with contrast
70498 Ct scan of blood vessels of neck with contrast
76700 Complete ultrasound scan of abdomen
70496 Ct scan of blood vessels of head with contrast
74018 X-ray of abdomen, 1 view
70486 Ct scan of face without contrast
71250 Ct scan of chest without contrast
73560 X-ray of knee, 1-2 views
71275 Ct scan of blood vessels of chest with contrast
72197 Mri scan of pelvis before and after contrast
73110 X-ray of wrist, minimum of 3 views
77063 Screening 3d breast mammography
77067 Screening mammography
76536 Ultrasound scan of head and neck soft tissue
73610 X-ray of ankle, minimum of 3 views
72141 Mri scan of upper spinal canal without contrast
76770 Complete ultrasound scan behind abdominal cavity
77080 Dxa bone density measurement of hip, pelvis, spine
93971 Ultrasound study of one arm or leg veins with compression and maneuvers
72050 X-ray of upper spine, 4-5 views
76856 Complete ultrasound scan of pelvis
72170 X-ray of pelvis, 1-2 views
74183 Mri scan of abdomen before and after contrast
76830 Ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina
72082 X-ray of entire middle and lower spine, 2-3 views
74176 Ct scan of abdomen and pelvis without contrast
72040 X-ray of upper spine, 2-3 views
74230 Imaging for evaluation of swallowing function
73080 X-ray of elbow, minimum of 3 views
70543 Mri scan of bone of eye socket, face, and/or neck before and after contrast
70544 Mri scan of blood vessels of head without contrast
93970 Ultrasound study of arm or leg veins with compression and maneuvers
72070 X-ray of middle spine, 2 views
72131 Ct scan of lower spine without contrast
72158 Mri scan of lower spinal canal before and after contrast
77014 Ct guidance for insertion of radiation therapy fields
73522 X-ray of both hips, 3-4 views
74174 Ct scan of blood vessels of abdomen and pelvis with contrast
73140 X-ray of finger, minimum of 2 views
93880 Ultrasound of both sides of head and neck blood flow
74178 Ct scan of abdomen and pelvis before and after contrast
72146 Mri scan of middle spinal canal without contrast
71101 X-ray of ribs on side of body, minimum of 3 views
73552 X-ray of thigh bone, minimum 2 views
70491 Ct scan of soft tissue of neck with contrast
72157 Mri scan of middle spinal canal before and after contrast
72195 Mri scan of pelvis without contrast
73590 X-ray of lower leg, 2 views
72120 X-ray lower and sacral spine, 2-3 views bending views
73090 X-ray of forearm, 2 views
76882 Limited ultrasound scan of joint or other extremity structure except blood vessels
G0279 Diagnostic digital breast tomosynthesis, unilateral or bilateral (list separately in addition to 77065 or 77066)
38792 Injection of radioactive material for x-ray identification of lymph node
70549 Mri scan of blood vessels of neck before and after contrast
73700 Ct scan of leg without contrast
74181 Mri scan of abdomen without contrast
32555 Aspiration of fluid from chest cavity using imaging guidance
73200 Ct scan of arm without contrast
75574 Ct scan of blood vessels and grafts of heart with contrast
76706 Ultrasound scan of abdominal aorta
72080 X-ray of middle and lower spine, 2 views
72128 Ct scan of middle spine without contrast
72192 Ct scan of pelvis without contrast
73060 X-ray of upper arm, minimum of 2 views
74220 Single contrast x-ray of esophagus
76705 Limited ultrasound scan of abdomen
77065 Diagnostic mammography of 1 breast
72156 Mri scan of upper spinal canal before and after contrast
72220 X-ray of sacrum and tailbone, minimum of 2 views
73501 X-ray of hip, 1 view
73100 X-ray of wrist, 2 views
77002 Fluoroscopic guidance for needle placement
77081 Dxa bone density measurement of forearm, finger, hand, or foot
10005 Fine needle aspiration biopsy using ultrasound guidance, first growth
20610 Aspiration and/or injection of fluid from large joint
73521 X-ray of both hips, 2 views
75561 Mri scan of heart before and after contrast
75565 Mri scan of blood flow of heart
76857 Limited ultrasound scan of pelvis

These are this provider's own Medicare Part B fee-for-service volumes (CMS public data). CMS suppresses rows with fewer than 11 beneficiaries, so low-volume codes may be missing entirely — absence is not zero. Beneficiary-episodes count CMS's per-setting beneficiary figures, not unique patients. Average charge and average Medicare payment are weighted by service volume across office and facility settings. Volumes on this page are personal to the NPI and are not attributed to any physician group. See Methods & Sources.