Aaron Johnson, MD
NPI 1538420641 · Orthopaedic Surgery Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Aaron Johnson, MD is a Orthopaedic Surgery Physician provider in Baltimore, MD (NPI 1538420641).
Provider details
- NPI number
- 1538420641
- Entity type
- Individual
- Primary specialty
- Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- D85157 (MD)
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
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
973 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 | 216 | $183 |
| X-Ray of Knee, 1-2 Views73560 | 124 | $23 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 119 | $73 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 116 | $132 |
| X-Ray of Hip, 2-3 Views73502 | 86 | $30 |
| X-Ray of Both Knees While Standing73565 | 84 | $31 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Meloxicam | 48 | 24 |
| Amoxicillin | 29 | 12 |
| Mupirocin | 11 | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,706 across 5 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
Additional practice locations (1)
- 1250 E Marshall St # 980153Richmond, VA 23298-5051Phone: (804) 628-2676
Registry dates
- Enumerated
- 2012-06-05
- Last updated
- 2019-07-22
Frequently asked questions
- What is Aaron Johnson's NPI number?
- Aaron Johnson's National Provider Identifier (NPI) is 1538420641, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Aaron Johnson's specialty?
- Aaron Johnson is listed in the NPPES registry with a primary specialty of Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Aaron Johnson located?
- Aaron Johnson's practice location on file with NPPES is 22 S Greene St, Baltimore, MD 21201-1544.
- What is Aaron Johnson's phone number?
- The practice phone number listed in the NPPES registry for Aaron Johnson is (410) 448-6400.
- Does Aaron Johnson accept Medicare?
- Aaron Johnson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Aaron Johnson's NPI active?
- Yes — Aaron Johnson's NPI (1538420641) is active in the NPPES registry as of the last update on 2019-07-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.