Megan Houlahan, AGNP
NPI 1972975183 · Adult Health Nurse Practitioner · Clayton, MO
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Megan Houlahan, AGNP is a Adult Health Nurse Practitioner provider in Clayton, MO (NPI 1972975183).
Provider details
- NPI number
- 1972975183
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- AGNP
- Sex
- Female
- Sole proprietor
- No
- License
- 2015038454 (MO)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
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
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
7 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
63 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 63 | $103 |
Typical Medicare-allowed amounts for these services range $103–$103 (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 · 1 distinct drug on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 22 | 13 |
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.
$228 across 2 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 (6)
- 998 Woods Mill RdBallwin, MO 63011-5101Phone: (636) 288-4149
- 11160 Village North DrJennings, MO 63136-6159Phone: (636) 288-4149
- 3655 Vista AveSaint Louis, MO 63110-2539Phone: (314) 268-7700
- 4455 Duncan AveSaint Louis, MO 63110-1111Phone: (636) 288-4149
- 10 Hospital Dr Fl 3Saint Peters, MO 63376-1659Phone: (636) 288-4149
- 5400 Executive Centre PkwySaint Peters, MO 63376-2594Phone: (636) 288-4149
Registry dates
- Enumerated
- 2015-10-27
- Last updated
- 2025-07-10
- Certified
- 2025-07-10
Frequently asked questions
- What is Megan Houlahan's NPI number?
- Megan Houlahan's National Provider Identifier (NPI) is 1972975183, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Megan Houlahan's specialty?
- Megan Houlahan is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Megan Houlahan located?
- Megan Houlahan's practice location on file with NPPES is 401 Corporate Park Dr, Clayton, MO 63105-4201.
- What is Megan Houlahan's phone number?
- The practice phone number listed in the NPPES registry for Megan Houlahan is (636) 288-4149.
- Does Megan Houlahan accept Medicare?
- Megan Houlahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Megan Houlahan's NPI active?
- Yes — Megan Houlahan's NPI (1972975183) is active in the NPPES registry as of the last update on 2025-07-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.