NPPES file of Aug 9, 2026

Douglas Severance, M.D.

Family Medicine Physician · San Ramon, CA

Douglas Severance, M.D. is a family medicine physician with a practice address in San Ramon, California, and NPI 1639289838, issued on Aug 30, 2006. Check the license (California G35610, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1639289838
Name
Douglas Severance
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
G35610 CA
Self-reported in NPPES; status is on the state search
Practice location
5601 Norris Canyon RD, San Ramon, CA 94583
Phone
(925) 275-0400
Enumerated
Aug 30, 2006
Record last updated
Aug 13, 2010 (not updated in 16 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20120210000677); accepts Medicare assignment
Medical or professional school
Loma Linda University School Of Medicine, 1976
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →

Also registered at 5601 Norris Canyon RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Lauren Alexander, RN, MSN, ANP-BCGeneral Practice Registered Nurse1689866998
  2. Richard Ash, MDPediatrics Physician1366445298
  3. Tsuling Chang, M.D.Dermatology Physician1154495240
  4. Sandy Chhiv, FNPFamily Nurse Practitioner1487102794
  5. Bradford Flagg, M.D.Family Medicine Physician1346323086
  6. Jayaram Hariharan, M.D.Family Medicine Physician1790004638

Verify Douglas Severance in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G35610    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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2.3 times the Medicare Part D claims of the average family medicine physician in 2024

8,011 Medicare Part D claims for 655 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 51 claims were for opioids.

  1. Douglas Severance8,011
  2. Specialty average3,544

Most prescribed

  1. Atorvastatin Calcium844 claims
  2. Lisinopril396 claims
  3. Amlodipine Besylate343 claims
  4. Losartan Potassium274 claims
  5. Rosuvastatin Calcium263 claims
  6. Levothyroxine Sodium262 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $2,222.42

105 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Douglas Severance$2,222.42
  2. Specialty average$902.55

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Douglas Severance among 17,133 family medicine physician records in California

Douglas Severance, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.

  • NPI issued2006 · 6% of these records are older, 59% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 62% of these records are
  • Graduated1976 · median 2005 among the 10,652 with a school on file
  • Record last updated2010 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

34 family medicine physician records list a practice address in San Ramon

They are 34 of the 2,281 NPPES records with a practice address in San Ramon, and 17,133 family medicine physician records in California.

All 17,133 in California → Every provider in San Ramon → Family Medicine Physician nationwide →

The 8 family medicine physician records with the nearest ZIP codes

  1. Eena Duggal, M.D.San Ramon, CA 945831619052271
  2. Bradford Flagg, M.D.San Ramon, CA 945831346323086
  3. Ralph Fong, M.D.San Ramon, CA 945831447290994
  4. Ethan Hollander, M.D.San Ramon, CA 945831528003597
  5. Afsheen Mostofi, D.O.San Ramon, CA 945831275607848
  6. Dolores Musco, M.D.San Ramon, CA 945831679601611
  7. Mark Musco, M.D.San Ramon, CA 945831578691523
  8. Marjan Naraghi-Arani, D.O.San Ramon, CA 945831821187881

Common questions

What is Douglas Severance, M.D.'s NPI number?

Douglas Severance, M.D.'s National Provider Identifier (NPI) is 1639289838, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Douglas Severance, M.D. located?

The NPPES record lists a practice address at 5601 Norris Canyon RD, San Ramon, CA, 94583. Phone: (925) 275-0400. Providers update this record themselves, so call before visiting.

How can I verify Douglas Severance, M.D.'s license?

NPPES lists California license number G35610, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Douglas Severance, M.D. prescribe under Medicare Part D?

In 2024, Douglas Severance, M.D. had 8,011 Medicare Part D claims for 655 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.