Maria Thomas-John, MD
NPI 1285847855 · Rheumatology Physician · Dayton, OH
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maria Thomas-John, MD is a Rheumatology Physician provider in Dayton, OH (NPI 1285847855).
Provider details
- NPI number
- 1285847855
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 35.087224 (OH)
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
19 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
1,865 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) |
|---|---|---|
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 940 | $13 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 594 | $120 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 169 | $86 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 80 | $105 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 54 | $158 |
| Administration of Influenza Virus VaccineG0008 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 1,472 | 354 |
| Hydroxychloroquine Sulfate | 1,063 | 271 |
| Methotrexate Sodiumbrand: Methotrexate | 740 | 166 |
| Alendronate Sodium | 400 | 100 |
| Adalimumabbrand: Humira(cf) Pen | 155 | 20 |
| Allopurinol | 121 | 24 |
| Leflunomide | 120 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$186 across 15 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
- 2007-05-08
- Last updated
- 2013-11-19
Frequently asked questions
- What is Maria Thomas-John's NPI number?
- Maria Thomas-John's National Provider Identifier (NPI) is 1285847855, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maria Thomas-John's specialty?
- Maria Thomas-John is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Maria Thomas-John located?
- Maria Thomas-John's practice location on file with NPPES is 1520 S Main St, Dayton, OH 45409-2698.
- What is Maria Thomas-John's phone number?
- The practice phone number listed in the NPPES registry for Maria Thomas-John is (937) 208-7275.
- Does Maria Thomas-John accept Medicare?
- Maria Thomas-John is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maria Thomas-John's NPI active?
- Yes — Maria Thomas-John's NPI (1285847855) is active in the NPPES registry as of the last update on 2013-11-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.