Nancy Williams, MD
NPI 1093701625 · Psychiatry Physician · Iowa City, IA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nancy Williams, MD is a Psychiatry Physician provider in Iowa City, IA (NPI 1093701625).
Provider details
- NPI number
- 1093701625
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 32404 (IA)
Specialties & taxonomies
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
95 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) |
|---|---|---|
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 76 | $45 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 19 | $87 |
Typical Medicare-allowed amounts for these services range $45–$87 (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 · 20 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Risperidone | 78 |
| Lorazepam | 57 |
| Trazodone Hcl | 56 |
| Clonazepam | 54 |
| Clozapine | 49 |
| Benztropine Mesylate | 47 |
| Sertraline Hcl | 36 |
| Quetiapine Fumarate | 30 |
| Paliperidone Palmitatebrand: Invega Sustenna | 27 |
| Venlafaxine Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-09-20
- Last updated
- 2007-12-19
Frequently asked questions
- What is Nancy Williams's NPI number?
- Nancy Williams's National Provider Identifier (NPI) is 1093701625, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Williams's specialty?
- Nancy Williams is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Nancy Williams located?
- Nancy Williams's practice location on file with NPPES is 200 Hawkins Dr, Iowa City, IA 52242-1009.
- What is Nancy Williams's phone number?
- The practice phone number listed in the NPPES registry for Nancy Williams is (319) 356-1616.
- Does Nancy Williams accept Medicare?
- Nancy Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nancy Williams's NPI active?
- Yes — Nancy Williams's NPI (1093701625) is active in the NPPES registry as of the last update on 2007-12-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.