Michael Richardson, M.D.
NPI 1831327899 · Geriatric Medicine (Family Medicine) Physician · Vacaville, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Richardson, M.D. is a Geriatric Medicine (Family Medicine) Physician provider in Vacaville, CA (NPI 1831327899).
Provider details
- NPI number
- 1831327899
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Family Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 35.122296 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,252 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 423 | $118 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 268 | $82 |
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More99306 | 170 | $197 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes99305 | 118 | $145 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 92 | $82 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 62 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 91 | 23 |
| Atorvastatin Calcium | 90 | 32 |
| Apixabanbrand: Eliquis | 87 | 17 |
| Amlodipine Besylate | 86 | 17 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 62 | 17 |
| Mirtazapine | 58 | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-06-29
- Last updated
- 2022-08-10
- Certified
- 2022-08-10
Frequently asked questions
- What is Michael Richardson's NPI number?
- Michael Richardson's National Provider Identifier (NPI) is 1831327899, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Richardson's specialty?
- Michael Richardson is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Family Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Richardson located?
- Michael Richardson's practice location on file with NPPES is 269 Sage Sparrow Cir, Vacaville, CA 95687-7751.
- What is Michael Richardson's phone number?
- The practice phone number listed in the NPPES registry for Michael Richardson is (707) 451-4111.
- Does Michael Richardson accept Medicare?
- Michael Richardson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Richardson's NPI active?
- Yes — Michael Richardson's NPI (1831327899) is active in the NPPES registry as of the last update on 2022-08-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.