Dr. Gregory John Martin, MD

  • San Francisco, CA
  • Family medicine physician
NPI1619995867PAC ID3678566734
Medicare services, 2024
392
Medicare patients, 2024
170
Part D claims, 2024
130
MIPS score, 2024
100
Hospital affiliations
3
Practice address
2333 Buchanan St, San Francisco, CA 94115
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD

Acute Care Hospital outpatient department · San Francisco, California

See all 6 affiliations

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Dr. Gregory John Martin is a family medicine physician in San Francisco, California

Dr. Martin practices at California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD in San Francisco, California.

Dr. Martin's NPI, 1619995867, was assigned on July 17, 2006. Dr. Martin graduated from University of Manitoba in 1983. Dr. Martin's California license number on file is A52803.

NPI and contact details
Medicare PAC ID
3678566734
NPI enumeration date
July 17, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Professional email
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Personal email
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Mobile number
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Sex
Male
Estimated age
69
Medical school graduation
1983

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Gregory John Martin practices at California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD in San Francisco, California

Dr. Martin's primary practice is California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD, at 2333 Buchanan St, San Francisco, CA 94115.

  • California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD
    2333 Buchanan St, San Francisco, CA 94115

Source: Dmand AI Affiliation Data

Dr. Gregory John Martin is affiliated with 5 sites of care and 1 medical group

Dr. Martin's primary practice is California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD in San Francisco, California. Dr. Martin is also affiliated with California Pacific Medical Center Van Ness Campus. The medical group on file is Pacific Inpatient Medical Group. Dmand AI also links Dr. Martin to 2 more hospitals and 1 group practice or clinic, each named with a free account.

See all 6 affiliations for Dr. Martin

Source: Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. Gregory John Martin's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Martin practices, 5 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPDAvailable with a free account
+4 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Gregory John Martin is one of 15,680 family medicine physicians in California

Family medicine is Dr. Martin's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Martin is board certified in family medicine by the American Board of Family Medicine. Dmand AI has Dr. Martin's licenses on file in 2 states: California and Rhode Island.

Specialties and state licenses

  • Family medicine, CaliforniaPrimaryLicense A52803 · 1994 to 2025 · taxonomy 207Q00000X
  • Rhode Island license1997 to 1998

Clinical focus

Dmand AI lists atrial fibrillation and flutter, cellulitis, chronic anemia, chronic diabetes, chronic hypertension, congestive heart failure, electrolyte disorders and gastrointestinal bleeding among the conditions Dr. Martin treats.

Family medicine physicians near Dr. Martin

Counts of family medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Gregory John Martin billed Medicare for 392 services in 2024

CMS data shows 392 Medicare services from Dr. Martin across 6 procedure codes in 2024, for 170 Medicare patients. Medicare paid $49,345 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024392
Medicare patients170
Paid by Medicare$49,345
Procedure codes6

Dr. Martin's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 4292024: 36515%
Other services
2023: 262024: 274%

Dr. Martin compared with the California median for family medicine physicians, 2024

  • Dr. Martin
  • California median
Medicare services
392vs 24659% above
Medicare patients
170vs 11844% above
Part D claims
13vs 83398% below

Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.

Dr. Martin's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Gregory John Martin treated 170 Medicare patients in 2024, average age 75

CMS counts 170 Medicare patients who saw Dr. Martin in 2024. The largest group is 75 to 84, with 59 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 54% are also on Medicaid. Their average risk score is 2.43, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Martin's median patient age at 70, with 38% women.

Medicare patients, 2024170
Average age75
Average risk score2.43
Also on Medicaid54%

Dr. Martin's Medicare patients by age, 2024

Dr. Martin's Medicare patients by sex, 2024

  • Women7544%
  • Men9556%

Chronic conditions among Dr. Martin's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis54%
  4. Mood disorders52%
  5. Depression45%
  6. Atrial fibrillation39%
  7. Chronic kidney disease39%
  8. Anxiety38%

Share of Medicare patients with each condition. A patient can have several.

Dr. Martin's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 70

Patient panel by sex, all payers

  • Women38%
  • Men54%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Gregory John Martin wrote 130 Medicare Part D claims in 2024

In 2024, Dr. Martin wrote 130 Medicare Part D claims for 45 patients. 75% of them were for generic drugs. CMS names the drug for 13 of them, across 1 drug with 11 or more claims each, at $7,930 in total drug cost. In 2020, CMS named 29 claims across 2 drugs.

Part D claims, 2024130
Drugs named by CMS1
Total drug cost$7,930
Part D patients45

Dr. Martin's Part D claims by kind of drug, 2024

  • Generic98 claims75%
  • Brand-name and other32 claims25%

Dr. Martin's most prescribed drugs by claims, 2023

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Dr. Martin's Part D claims, 2024

  • Antibiotics15%19 of 130 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2020 to 2023

  • 2020
  • 2023
Claims for drugs CMS names
2020: 292023: 1355%

Drugs named by CMS: 1 in 2023, 2 in 2020.

See all prescribing by Dr. Martin

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Gregory John Martin scored 100 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Martin for performance year 2024, reported as part of a group. Dr. Martin accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Dr. Martin's MIPS scores, performance year 2024

  • 100of 100Final score
  • 90of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 78of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Dr. Gregory John Martin received $302 in industry payments from 2016 to 2021

CMS Open Payments shows 3 general payments to Dr. Martin from 3 drug and device companies from 2016 to 2021. Food and beverage make up the largest share, 100% of the total. Mallinckrodt LLC paid the most, $124.

General payments to Dr. Martin by program year, 2016 to 2021

Companies that paid Dr. Martin the most, 2016 to 2021

Share is of all general payments to this clinician.

See all payments to Dr. Martin

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Gregory John Martin graduated from University of Manitoba

Dr. Martin graduated from University of Manitoba in 1983. Dr. Martin is a member of SHM.

  1. Medical schoolUniversity of Manitoba
  2. Board certified in family medicineAmerican Board of Family Medicine
  3. Board certified in hospice and palliative medicineAmerican Board of Family Medicine

Source: Dmand AI Professional Profile Data

Dr. Gregory John Martin accepts plans from 4 insurance carriers

Dr. Martin is in network with 4 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and Regence Health Plans. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.

  • Blue Cross Blue Shield of Michigan
  • Blue Cross Blue Shield of Massachusetts
  • Regence Health Plans
  • CMS Medicare

Plan types Dr. Martin accepts, by number of carriers

  1. Medicare4
  2. PPO3
  3. HMO1
  4. POS1

Source: Dmand AI Insurance Network Data

Sources for Dr. Gregory John Martin's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Gregory John Martin

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Gregory John Martin's NPI number?

Dr. Gregory John Martin's NPI number is 1619995867. It was assigned on July 17, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Gregory John Martin?

Dr. Gregory John Martin is a family medicine physician in San Francisco, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).

Where does Dr. Gregory John Martin practice?

Dr. Martin practices at 2333 Buchanan St, San Francisco, CA 94115. Dr. Martin's primary practice is California Pacific Medical Center - B.H. Cancer Care Center-Buchanan St - HOPD in San Francisco, California. Dmand AI also links Dr. Martin to 2 hospitals and 1 group practice or clinic.

What is Dr. Gregory John Martin's medical license number?

Dr. Martin's California license number on file is A52803, one of the licenses on file in 2 states.

Which states has Dr. Gregory John Martin been licensed in?

Dmand AI has state licenses on file for Dr. Martin in California (1994 to 2025) and Rhode Island (1997 to 1998).

Which hospitals is Dr. Gregory John Martin affiliated with?

Dr. Martin is affiliated with California Pacific Medical Center Van Ness Campus. Dmand AI links Dr. Martin to 2 more hospitals.

What medical group is Dr. Gregory John Martin part of?

Dr. Martin is linked to Pacific Inpatient Medical Group.

Does Dr. Gregory John Martin accept Medicare?

Yes. CMS data shows Dr. Martin billed Medicare for 392 services in 2024, and Dr. Martin accepts Medicare assignment.

What is Dr. Gregory John Martin's MIPS score?

Dr. Martin's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.

How many Medicare patients does Dr. Gregory John Martin see?

CMS counts 170 Medicare patients who saw Dr. Martin in 2024, with an average age of 75.

Show 7 more questionsShow fewer questions

Is Dr. Gregory John Martin board certified?

Yes. Dr. Martin is board certified in family medicine by the American Board of Family Medicine.

What services does Dr. Gregory John Martin bill to Medicare?

In 2024, Dr. Martin's most billed Medicare services were hospital inpatient care (99233), critical care (99291) and hospital inpatient care (99239).

Where did Dr. Gregory John Martin go to medical school?

Dr. Martin graduated from University of Manitoba in 1983.

What drugs does Dr. Gregory John Martin prescribe most?

In 2023 Medicare Part D data, Dr. Martin's most prescribed drugs by claims were Eliquis.

Has Dr. Gregory John Martin received payments from drug or device companies?

CMS Open Payments shows $302 in general payments to Dr. Martin from 3 companies from 2016 to 2021. The largest total came from Mallinckrodt LLC.

How long has Dr. Gregory John Martin been practicing?

Dr. Martin graduated from medical school in 1983, 43 years ago.

What insurance does Dr. Gregory John Martin accept?

Dr. Martin is in network with 4 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and Regence Health Plans. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.

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