Mary Horseman, CRNP
NPI 1598778680 · Nurse Practitioner · Easton, MD
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Horseman, CRNP is a Nurse Practitioner provider in Easton, MD (NPI 1598778680).
Provider details
- NPI number
- 1598778680
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CRNP
- Sex
- Female
- Sole proprietor
- No
- License
- R094441 (MD)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
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
308 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 | 238 | $152 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 50 | $187 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 20 | $142 |
Typical Medicare-allowed amounts for these services range $142–$187 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Famotidine | 304 | 119 |
| Pantoprazole Sodium | 277 | 100 |
| Omeprazole | 83 | 28 |
| Linaclotidebrand: Linzess | 64 | 17 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 31 | 29 |
| Esomeprazole Magnesium | 29 | 12 |
| Dexlansoprazolebrand: Dexlansoprazole Dr | 24 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,085 across 50 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
- 2006-08-13
- Last updated
- 2011-11-01
Frequently asked questions
- What is Mary Horseman's NPI number?
- Mary Horseman's National Provider Identifier (NPI) is 1598778680, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Horseman's specialty?
- Mary Horseman is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Horseman located?
- Mary Horseman's practice location on file with NPPES is 511 Idlewild Ave, Easton, MD 21601-3888.
- What is Mary Horseman's phone number?
- The practice phone number listed in the NPPES registry for Mary Horseman is (410) 822-6005.
- Does Mary Horseman accept Medicare?
- Mary Horseman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Horseman's NPI active?
- Yes — Mary Horseman's NPI (1598778680) is active in the NPPES registry as of the last update on 2011-11-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.