Derrick Williamson, DO
NPI 1215922059 · Family Medicine Physician · Southfield, MI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Derrick Williamson, DO is a Family Medicine Physician provider in Southfield, MI (NPI 1215922059).
Provider details
- NPI number
- 1215922059
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- DW009333 (MI)
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 tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
82 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 59 | $181 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 12 | $14 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 11 | $129 |
Typical Medicare-allowed amounts for these services range $14–$181 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Bes/Olmesartan Medbrand: Amlodipine-Olmesartan | 34 | 12 |
| Atorvastatin Calcium | 31 | — |
| Levothyroxine Sodium | 19 | — |
| Rosuvastatin Calcium | 17 | — |
| Allopurinol | 16 | — |
| Metoprolol Succinate | 15 | — |
| Semaglutide |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,851 across 20 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-09-19
- Last updated
- 2022-11-02
- Certified
- 2022-11-02
Frequently asked questions
- What is Derrick Williamson's NPI number?
- Derrick Williamson's National Provider Identifier (NPI) is 1215922059, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Derrick Williamson's specialty?
- Derrick Williamson is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Derrick Williamson located?
- Derrick Williamson's practice location on file with NPPES is 20755 Greenfield Rd Ste 100, Southfield, MI 48075-5400.
- What is Derrick Williamson's phone number?
- The practice phone number listed in the NPPES registry for Derrick Williamson is (947) 282-5009.
- Does Derrick Williamson accept Medicare?
- Derrick Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Derrick Williamson's NPI active?
- Yes — Derrick Williamson's NPI (1215922059) is active in the NPPES registry as of the last update on 2022-11-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.