Martha Johnson, M.D.
NPI 1669649885 · Family Medicine Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Martha Johnson, M.D. is a Family Medicine Physician provider in Baltimore, MD (NPI 1669649885).
Provider details
- NPI number
- 1669649885
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 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
615 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 231 | $107 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 100 | $80 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 61 | $134 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 61 | $17 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 43 | $76 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 43 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 145 | 46 |
| Amlodipine Besylate | 83 | 24 |
| Lisinopril | 74 | 24 |
| Metoprolol Succinate | 60 | 19 |
| Gabapentin | 58 | 20 |
| Levothyroxine Sodium | 57 | 16 |
| Losartan Potassium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-05-15
- Last updated
- 2016-08-29
Frequently asked questions
- What is Martha Johnson's NPI number?
- Martha Johnson's National Provider Identifier (NPI) is 1669649885, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Martha Johnson's specialty?
- Martha Johnson is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Martha Johnson located?
- Martha Johnson's practice location on file with NPPES is 9101 Franklin Square Dr, Baltimore, MD 21237-3936.
- What is Martha Johnson's phone number?
- The practice phone number listed in the NPPES registry for Martha Johnson is (443) 777-2000.
- Does Martha Johnson accept Medicare?
- Martha Johnson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Martha Johnson's NPI active?
- Yes — Martha Johnson's NPI (1669649885) is active in the NPPES registry as of the last update on 2016-08-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.