Merrith Karl, FNP-C
NPI 1669800546 · Family Nurse Practitioner · Humble, TX
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Merrith Karl, FNP-C is a Family Nurse Practitioner provider in Humble, TX (NPI 1669800546).
Provider details
- NPI number
- 1669800546
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Male
- Sole proprietor
- No
- License
- AP124663 (TX)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
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 tenure38% of score
12 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tizanidine Hcl | 12 | 12 |
| Acetaminophen With Codeinebrand: Acetaminophen-Codeine | 11 | 11 |
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-10-31
- Last updated
- 2024-09-17
- Certified
- 2024-09-17
Frequently asked questions
- What is Merrith Karl's NPI number?
- Merrith Karl's National Provider Identifier (NPI) is 1669800546, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Merrith Karl's specialty?
- Merrith Karl is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Merrith Karl located?
- Merrith Karl's practice location on file with NPPES is 18951 N Memorial Dr, Humble, TX 77338-4217.
- What is Merrith Karl's phone number?
- The practice phone number listed in the NPPES registry for Merrith Karl is (281) 540-7999.
- Does Merrith Karl accept Medicare?
- Merrith Karl is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Merrith Karl's NPI active?
- Yes — Merrith Karl's NPI (1669800546) is active in the NPPES registry as of the last update on 2024-09-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.