Mary Ann Johnson, MD
NPI 1508177163 · Dermatology Physician · El Dorado Hills, CA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Ann Johnson, MD is a Dermatology Physician provider in El Dorado Hills, CA (NPI 1508177163).
Provider details
- NPI number
- 1508177163
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
4,156 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) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 1,651 | $8 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 1,071 | $100 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 605 | $57 |
| Destruction of Skin Growth, 1-14 Growths17110 | 358 | $120 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 70 | $121 |
| Shaving of Skin Growth of Body, Arms, Or Legs, 0.5 Cm Or Less11300 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ketoconazole | 200 | 89 |
| Fluorouracil | 149 | 135 |
| Clobetasol Propionate | 144 | 65 |
| Triamcinolone Acetonide | 107 | 67 |
| Hydrocortisone | 99 | 70 |
| Mupirocin | 92 | 65 |
| Clindamycin Phosphate | 50 | 24 |
| Doxycycline Hyclate | 49 | 33 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-06-29
- Last updated
- 2015-07-14
Frequently asked questions
- What is Mary Ann Johnson's NPI number?
- Mary Ann Johnson's National Provider Identifier (NPI) is 1508177163, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Ann Johnson's specialty?
- Mary Ann Johnson is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Ann Johnson located?
- Mary Ann Johnson's practice location on file with NPPES is 1264 Hawks Flight Ct, El Dorado Hills, CA 95762-9348.
- What is Mary Ann Johnson's phone number?
- The practice phone number listed in the NPPES registry for Mary Ann Johnson is (916) 939-8400.
- Does Mary Ann Johnson accept Medicare?
- Mary Ann Johnson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Ann Johnson's NPI active?
- Yes — Mary Ann Johnson's NPI (1508177163) is active in the NPPES registry as of the last update on 2015-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.