Ronald Kerwin, MD
NPI 1265497622 · Dermatology Physician · West Bloomfield, MI
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ronald Kerwin, MD is a Dermatology Physician provider in West Bloomfield, MI (NPI 1265497622).
Provider details
- NPI number
- 1265497622
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 044088 (MI)
Specialties & taxonomies
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
2,907 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) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 500 | $6 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 480 | $91 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 355 | $128 |
| Biopsy of Related Skin Growth, First Growth11102 | 306 | $95 |
| Destruction of Precancer Skin Growth, 15 Or More Growths17004 | 283 | $167 |
| Destruction of Precancer Skin Growth, 1 Growth17000 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Triamcinolone Acetonide | 469 | 338 |
| Mupirocin | 136 | 117 |
| Doxycycline Monohydrate | 134 | 72 |
| Hydrocortisone | 110 | 76 |
| Ketoconazole | 93 | 63 |
| Fluocinonide | 84 | 51 |
| Methylprednisolone | 81 | 71 |
| Valacyclovir Hclbrand: Valacyclovir | 70 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,355 across 63 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
- 2006-04-19
- Last updated
- 2020-11-18
- Certified
- 2020-11-18
Frequently asked questions
- What is Ronald Kerwin's NPI number?
- Ronald Kerwin's National Provider Identifier (NPI) is 1265497622, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ronald Kerwin's specialty?
- Ronald Kerwin is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Ronald Kerwin located?
- Ronald Kerwin's practice location on file with NPPES is 6330 Orchard Lake Rd, West Bloomfield, MI 48322-2398.
- What is Ronald Kerwin's phone number?
- The practice phone number listed in the NPPES registry for Ronald Kerwin is (248) 855-3366.
- Does Ronald Kerwin accept Medicare?
- Ronald Kerwin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ronald Kerwin's NPI active?
- Yes — Ronald Kerwin's NPI (1265497622) is active in the NPPES registry as of the last update on 2020-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.