Alyssa Keller, M.D.
NPI 1588892665 · Family Medicine Physician · O Fallon, MO
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alyssa Keller, M.D. is a Family Medicine Physician provider in O Fallon, MO (NPI 1588892665).
Provider details
- NPI number
- 1588892665
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 2009017184 (MO)
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
17 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
289 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 114 | $120 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 80 | $124 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 47 | $86 |
| Administration of Influenza Virus VaccineG0008 | 30 | $31 |
| Hemoglobin A1c Level83036 | 18 | $10 |
Typical Medicare-allowed amounts for these services range $10–$124 (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 · 71 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 337 | 100 |
| Lisinopril | 224 | 61 |
| Losartan Potassium | 195 | 57 |
| Amlodipine Besylate | 177 | 48 |
| Levothyroxine Sodium | 154 | 42 |
| Rosuvastatin Calcium | 145 | 43 |
| Omeprazole |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$792 across 44 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
Registry dates
- Enumerated
- 2009-06-26
- Last updated
- 2012-06-30
Frequently asked questions
- What is Alyssa Keller's NPI number?
- Alyssa Keller's National Provider Identifier (NPI) is 1588892665, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alyssa Keller's specialty?
- Alyssa Keller is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alyssa Keller located?
- Alyssa Keller's practice location on file with NPPES is 300 Winding Woods Dr, O Fallon, MO 63366-4771.
- What is Alyssa Keller's phone number?
- The practice phone number listed in the NPPES registry for Alyssa Keller is (636) 978-8600.
- Does Alyssa Keller accept Medicare?
- Alyssa Keller is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alyssa Keller's NPI active?
- Yes — Alyssa Keller's NPI (1588892665) is active in the NPPES registry as of the last update on 2012-06-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.