Grant Mcwilliams, D.O.
NPI 1598729204 · Obstetrics & Gynecology Physician · Cape Girardeau, MO
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grant Mcwilliams, D.O. is a Obstetrics & Gynecology Physician provider in Cape Girardeau, MO (NPI 1598729204).
Provider details
- NPI number
- 1598729204
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 1074 (HI)
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 tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
144 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 43 | $85 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 35 | $63 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 25 | $94 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 16 | $120 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 14 | $9 |
| Ultrasound Scan of Uterus, Ovaries, Tubes, Cervix and Pelvic Area Through Vagina |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ibuprofen | 49 | 46 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 46 | 43 |
| Norethindrone Acetate | 37 | — |
| Estradiol | 34 | 19 |
| Medroxyprogesterone Acetate | 32 | — |
| Oxybutynin Chloridebrand: Oxybutynin Chloride Er | 27 | 12 |
| Paroxetine Hcl | 18 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$56 across 1 record (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
Registry dates
- Enumerated
- 2006-04-12
- Last updated
- 2021-03-09
- Certified
- 2021-03-09
Frequently asked questions
- What is Grant Mcwilliams's NPI number?
- Grant Mcwilliams's National Provider Identifier (NPI) is 1598729204, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grant Mcwilliams's specialty?
- Grant Mcwilliams is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Grant Mcwilliams located?
- Grant Mcwilliams's practice location on file with NPPES is 211 Saint Francis Dr, Cape Girardeau, MO 63703-5049.
- What is Grant Mcwilliams's phone number?
- The practice phone number listed in the NPPES registry for Grant Mcwilliams is (573) 339-1166.
- Does Grant Mcwilliams accept Medicare?
- Grant Mcwilliams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Grant Mcwilliams's NPI active?
- Yes — Grant Mcwilliams's NPI (1598729204) is active in the NPPES registry as of the last update on 2021-03-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.