Robert Mayer, M.D.
NPI 1003865585 · Physical Medicine & Rehabilitation Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Physical Medicine and Rehabilitation · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Mayer, M.D. is a Physical Medicine & Rehabilitation Physician provider in Baltimore, MD (NPI 1003865585).
Provider details
- NPI number
- 1003865585
- Entity type
- Individual
- Primary specialty
- Physical Medicine & Rehabilitation PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D57380 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,610 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 890 | $80 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 224 | $119 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 137 | $130 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 99 | $83 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 59 | $132 |
| Maintenance of Spinal Canal Or Brain Drug Infusion Pump By Health Care Professional95991 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 82 | 15 |
| Gabapentin | 41 | — |
| Tramadol Hcl | 41 | — |
| Baclofen | 38 | 15 |
| Tizanidine Hcl | 34 | — |
| Morphine Sulfatebrand: Morphine Sulfate Er | 28 | — |
| Pregabalin | 25 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-10
- Last updated
- 2013-02-12
Frequently asked questions
- What is Robert Mayer's NPI number?
- Robert Mayer's National Provider Identifier (NPI) is 1003865585, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Mayer's specialty?
- Robert Mayer is listed in the NPPES registry with a primary specialty of Physical Medicine & Rehabilitation Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Mayer located?
- Robert Mayer's practice location on file with NPPES is 600 N Wolfe St, Baltimore, MD 21287-0005.
- What is Robert Mayer's phone number?
- The practice phone number listed in the NPPES registry for Robert Mayer is (410) 532-4701.
- Does Robert Mayer accept Medicare?
- Robert Mayer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Mayer's NPI active?
- Yes — Robert Mayer's NPI (1003865585) is active in the NPPES registry as of the last update on 2013-02-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.