Anne Nash, M.D.
NPI 1558440776 · Family Medicine Physician · O Fallon, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Anne Nash, M.D. is a Family Medicine Physician provider in O Fallon, IL (NPI 1558440776).
Provider details
- NPI number
- 1558440776
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 36116476 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
108 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) |
|---|---|---|
| Hemoglobin A1c Level83036 | 33 | $10 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 26 | $79 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 25 | $78 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 24 | $129 |
Typical Medicare-allowed amounts for these services range $10–$129 (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 · 94 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 300 | 90 |
| Lisinopril | 163 | 43 |
| Amlodipine Besylate | 153 | 49 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 150 | 30 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 126 | 36 |
| Levothyroxine Sodium | 113 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$32 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 (1)
- 180 S 3rd St Ste 104Belleville, IL 62220-1952Phone: (618) 222-4701Fax: (618) 222-4754
Registry dates
- Enumerated
- 2006-11-06
- Last updated
- 2021-05-24
- Certified
- 2021-05-24
Frequently asked questions
- What is Anne Nash's NPI number?
- Anne Nash's National Provider Identifier (NPI) is 1558440776, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Anne Nash's specialty?
- Anne Nash is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Anne Nash located?
- Anne Nash's practice location on file with NPPES is 3 Saint Elizabeth Blvd Ste 4000, O Fallon, IL 62269-1099.
- What is Anne Nash's phone number?
- The practice phone number listed in the NPPES registry for Anne Nash is (618) 233-5480.
- Does Anne Nash accept Medicare?
- Anne Nash is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Anne Nash's NPI active?
- Yes — Anne Nash's NPI (1558440776) is active in the NPPES registry as of the last update on 2021-05-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.