NPPES file of Aug 9, 2026

Michael L. Richardson, M.D.

Geriatric Medicine (Family Medicine) Physician · Vacaville, CA

Michael L. Richardson, M.D. is a geriatric medicine (family medicine) physician with a practice address in Vacaville, California, and NPI 1831327899, issued on Jun 29, 2009. Check the license (California A155227, 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
1831327899
Name
Michael L. Richardson
Credential
M.D.
Primary taxonomy
Geriatric Medicine (Family Medicine) Physician 207QG0300X
License numbers
A155227 CA
35.122296 OH
Self-reported in NPPES; status is on the state search
Practice location
269 Sage Sparrow Cir, Vacaville, CA 95687
Phone
(707) 451-4111
Enumerated
Jun 29, 2009
Record last updated
Aug 10, 2022
Medicare enrollment
Enrolled (PECOS I20180426002300); accepts Medicare assignment
Medical or professional school
University Of Texas Medical Branch At Galveston, 2009
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 geriatric medicine (family medicine) physician records → All 243 in California → Look up another NPI →

Also registered at 269 Sage Sparrow Cir

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

  1. Kathryn Amacher, DOGeriatric Medicine (Internal Medicine) Physician1366545568
  2. Christine Romer, LCSWClinical Social Worker1295980811
  3. Anita Stonawski-Semple, DNP, FNPFamily Nurse Practitioner1063844314

Verify Michael L. Richardson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A155227    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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54% fewer Medicare Part D claims than the average geriatric medicine (family medicine) physician in 2024

2,411 Medicare Part D claims for 118 beneficiaries, against an average of 5,222 among the 1,271 providers of this specialty who prescribed in Part D. 168 claims were for opioids.

  1. Michael Richardson2,411
  2. Specialty average5,222

Most prescribed

  1. Levothyroxine Sodium91 claims
  2. Atorvastatin Calcium90 claims
  3. Eliquis87 claims
  4. Amlodipine Besylate86 claims
  5. Hydrocodone-Acetaminophen62 claims
  6. Mirtazapine58 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.

Bills Medicare through one group practice

  1. Snf Rehab OnlyVacaville, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Michael L. Richardson among 243 geriatric medicine (family medicine) physician records in California

Michael L. Richardson, M.D. is one of 243 geriatric medicine (family medicine) physician records with a practice address in California. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 70% of them.

  • NPI issued2009 · 70% of these records are older, 28% newer
  • In a Medicare fileYes · 76% of these records are
  • In the CMS Doctors and Clinicians fileYes · 46% of these records are
  • Graduated2009 · median 2004 among the 111 with a school on file
  • Record last updated2022 · 69% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QG0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Geriatric Medicine (Family Medicine) Physician providers in California

There are 243 geriatric medicine (family medicine) physician records in California.

All 243 in California → Every provider in Vacaville → Geriatric Medicine (Family Medicine) Physician nationwide →

The 8 geriatric medicine (family medicine) physician records with the nearest ZIP codes

  1. Kristine Leenders, FNP-CVacaville, CA 956881487345773
  2. Kurtis Fox, M.D.Colfax, CA 957131396779930
  3. David Shirley, M.D.Rocklin, CA 957651275560484
  4. Faraz Zaidi, M.D.Carmichael, CA 956081225253099
  5. Ashkan Javaheri, M.D.Sacramento, CA 958161235328022
  6. Lam Van, MDSacramento, CA 958251437272432
  7. Monica Romo-Contreras, M.D.Sacramento, CA 958381821294117
  8. Christopher Claydon, M.D.Grass Valley, CA 959451518965235

Common questions

What is Michael L. Richardson, M.D.'s NPI number?

Michael L. Richardson, M.D.'s National Provider Identifier (NPI) is 1831327899, issued on Jun 29, 2009. An NPI identifies a provider in billing; it is not a license.

Where is Michael L. Richardson, M.D. located?

The NPPES record lists a practice address at 269 Sage Sparrow Cir, Vacaville, CA, 95687. Phone: (707) 451-4111. Providers update this record themselves, so call before visiting.

How can I verify Michael L. Richardson, M.D.'s license?

NPPES lists California license number A155227, 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 Michael L. Richardson, M.D. prescribe under Medicare Part D?

In 2024, Michael L. Richardson, M.D. had 2,411 Medicare Part D claims for 118 beneficiaries; the average among geriatric medicine (family medicine) physician prescribers was 5,222. 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.