Karen Williams, MD
NPI 1942244074 · Family Medicine Physician · Huntsville, AL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Williams, MD is a Family Medicine Physician provider in Huntsville, AL (NPI 1942244074).
Provider details
- NPI number
- 1942244074
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 36268 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,369 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 374 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 315 | $82 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 258 | $116 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 125 | $117 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 102 | $13 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 91 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 97 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 212 | 69 |
| Atorvastatin Calcium | 190 | 72 |
| Rosuvastatin Calcium | 141 | 49 |
| Levothyroxine Sodium | 129 | 43 |
| Levothyroxine Sodiumbrand: Synthroid | 126 | 33 |
| Lisinopril | 117 | 40 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-16
- Last updated
- 2009-12-29
Frequently asked questions
- What is Karen Williams's NPI number?
- Karen Williams's National Provider Identifier (NPI) is 1942244074, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Williams's specialty?
- Karen Williams is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Williams located?
- Karen Williams's practice location on file with NPPES is 2410 Commerce Ct Sw, Huntsville, AL 35801-5679.
- What is Karen Williams's phone number?
- The practice phone number listed in the NPPES registry for Karen Williams is (256) 539-7722.
- Does Karen Williams accept Medicare?
- Karen Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Williams's NPI active?
- Yes — Karen Williams's NPI (1942244074) is active in the NPPES registry as of the last update on 2009-12-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.