Alyssa Larimore, M.S., C.R.N.P., R.N.
NPI 1841411345 · Obstetrics & Gynecology Nurse Practitioner · Frederick, MD
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alyssa Larimore, M.S., C.R.N.P., R.N. is a Obstetrics & Gynecology Nurse Practitioner provider in Frederick, MD (NPI 1841411345).
Provider details
- NPI number
- 1841411345
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- M.S., C.R.N.P., R.N.
- Sex
- Female
- Sole proprietor
- No
- License
- R139855 (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
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
49 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) |
|---|---|---|
| Cervical Or Vaginal Cancer Screening; Pelvic and Clinical Breast ExaminationG0101 | 21 | $34 |
| Screening 3d Breast Mammography77063 | 14 | $44 |
| Screening Mammography77067 | 14 | $108 |
Typical Medicare-allowed amounts for these services range $34–$108 (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 · 5 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Estradiol | 23 |
| Progesterone, Micronizedbrand: Progesterone | 18 |
| Estradiolbrand: Estradiol (once Weekly) | 13 |
| Estradiolbrand: Estradiol (twice Weekly) | 13 |
| Estradiolbrand: Imvexxy | 12 |
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.
$254 across 13 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 (3)
- 8900 Columbia 100 PkwySuite EColumbia, MD 21045-2336Phone: (410) 997-6464Fax: (410) 997-6867
- 504 E Ridgeville Blvd Ste aMount Airy, MD 21771-5942Phone: (301) 663-6171Fax: (301) 663-6257
- 3430 Worthington Blvd Ste 202Urbana, MD 21704-7019Phone: (240) 699-0003Fax: (240) 699-0017
Registry dates
- Enumerated
- 2007-05-01
- Last updated
- 2023-11-02
- Certified
- 2023-11-02
Frequently asked questions
- What is Alyssa Larimore's NPI number?
- Alyssa Larimore's National Provider Identifier (NPI) is 1841411345, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alyssa Larimore's specialty?
- Alyssa Larimore is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Alyssa Larimore located?
- Alyssa Larimore's practice location on file with NPPES is 61 Thomas Johnson Dr, Frederick, MD 21702-4301.
- What is Alyssa Larimore's phone number?
- The practice phone number listed in the NPPES registry for Alyssa Larimore is (301) 663-6171.
- Does Alyssa Larimore accept Medicare?
- Alyssa Larimore is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alyssa Larimore's NPI active?
- Yes — Alyssa Larimore's NPI (1841411345) is active in the NPPES registry as of the last update on 2023-11-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.