Mary Howell, MD
NPI 1821058710 · Internal Medicine Physician · Hagerstown, MD
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Howell, MD is a Internal Medicine Physician provider in Hagerstown, MD (NPI 1821058710).
Provider details
- NPI number
- 1821058710
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- D0046075 (MD)
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
20 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
1,991 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 723 | $134 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 616 | $15 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 175 | $9 |
| Dxa Bone Density Measurement of Hip, Pelvis, Spine Including Spine Fracture Assessment77085 | 137 | $57 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 123 | $66 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 77 | $137 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydroxychloroquine Sulfate | 110 | 42 |
| Methotrexate Sodiumbrand: Methotrexate | 97 | 38 |
| Prednisone | 60 | 32 |
| Allopurinol | 44 | 18 |
| Alendronate Sodium | 34 | 17 |
| Colchicine | 26 | — |
| Tramadol Hcl | 20 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$975 across 38 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
- 2006-03-24
- Last updated
- 2010-06-09
Frequently asked questions
- What is Mary Howell's NPI number?
- Mary Howell's National Provider Identifier (NPI) is 1821058710, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Howell's specialty?
- Mary Howell is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Howell located?
- Mary Howell's practice location on file with NPPES is 346 Mill St, Hagerstown, MD 21740-6138.
- What is Mary Howell's phone number?
- The practice phone number listed in the NPPES registry for Mary Howell is (301) 791-6680.
- Does Mary Howell accept Medicare?
- Mary Howell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Howell's NPI active?
- Yes — Mary Howell's NPI (1821058710) is active in the NPPES registry as of the last update on 2010-06-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.