David Buyer, M.D.
NPI 1831164888 · Internal Medicine Physician · Chicago, IL
David Buyer, M.D. is a Internal Medicine Physician provider in Chicago, IL (NPI 1831164888).
Provider details
- NPI number
- 1831164888
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036092425 (IL)
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
186 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 53 | $132 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 45 | $92 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 44 | $133 |
| Hemoglobin A1c Level83036 | 31 | $10 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 13 | $58 |
Typical Medicare-allowed amounts for these services range $10–$133 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 82 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 280 | 75 |
| Amlodipine Besylate | 165 | 44 |
| Losartan Potassium | 119 | 29 |
| Rosuvastatin Calcium | 99 | 32 |
| Levothyroxine Sodium | 96 | 25 |
| Apixabanbrand: Eliquis | 72 | 16 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-22
- Last updated
- 2025-03-18
- Certified
- 2025-03-18
Frequently asked questions
- What is David Buyer's NPI number?
- David Buyer's National Provider Identifier (NPI) is 1831164888, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Buyer's specialty?
- David Buyer is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is David Buyer located?
- David Buyer's practice location on file with NPPES is 850 S Wabash Ave Ste 210, Chicago, IL 60605-3642.
- What is David Buyer's phone number?
- The practice phone number listed in the NPPES registry for David Buyer is (312) 598-3520.
- Is David Buyer's NPI active?
- Yes — David Buyer's NPI (1831164888) is active in the NPPES registry as of the last update on 2025-03-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.