Ali Keshavarzian, M.D.
NPI 1558302257 · Gastroenterology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ali Keshavarzian, M.D. is a Gastroenterology Physician provider in Chicago, IL (NPI 1558302257).
Provider details
- NPI number
- 1558302257
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
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
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
143 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 | 52 | $100 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 36 | $181 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 21 | $94 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 19 | $126 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 15 | $68 |
Typical Medicare-allowed amounts for these services range $68–$181 (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 · 43 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ustekinumabbrand: Stelara | 126 | 16 |
| Prucalopride Succinatebrand: Motegrity | 84 | 14 |
| Pantoprazole Sodium | 68 | 26 |
| Mesalamine | 67 | 20 |
| 0.9 % Sodium Chloridebrand: Sodium Chloride | 62 | — |
| Adalimumabbrand: Humira(cf) Pen | 58 | — |
| Colestipol Hcl | 49 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-10
- Last updated
- 2007-07-08
Frequently asked questions
- What is Ali Keshavarzian's NPI number?
- Ali Keshavarzian's National Provider Identifier (NPI) is 1558302257, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ali Keshavarzian's specialty?
- Ali Keshavarzian is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Ali Keshavarzian located?
- Ali Keshavarzian's practice location on file with NPPES is 1725 W Harrison St, Chicago, IL 60612-3841.
- What is Ali Keshavarzian's phone number?
- The practice phone number listed in the NPPES registry for Ali Keshavarzian is (312) 942-5861.
- Does Ali Keshavarzian accept Medicare?
- Ali Keshavarzian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ali Keshavarzian's NPI active?
- Yes — Ali Keshavarzian's NPI (1558302257) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.