Frank Aguilar, M.D.
NPI 1659802270 · Hospitalist Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Frank Aguilar, M.D. is a Hospitalist Physician provider in Chicago, IL (NPI 1659802270).
Provider details
- NPI number
- 1659802270
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036151972 (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
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
462 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 309 | $84 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 61 | $86 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 38 | $126 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 32 | $140 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 22 | $179 |
Typical Medicare-allowed amounts for these services range $84–$179 (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.
Practice location
Mailing address
Additional practice locations (1)
- 505 E 70th StNew York, NY 10021-4872Phone: (212) 746-9663Fax: (212) 746-3609
Registry dates
- Enumerated
- 2017-03-24
- Last updated
- 2020-07-24
- Certified
- 2020-07-24
Frequently asked questions
- What is Frank Aguilar's NPI number?
- Frank Aguilar's National Provider Identifier (NPI) is 1659802270, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Frank Aguilar's specialty?
- Frank Aguilar is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Frank Aguilar located?
- Frank Aguilar's practice location on file with NPPES is 251 E Huron St Ste 16-738, Chicago, IL 60611-3055.
- What is Frank Aguilar's phone number?
- The practice phone number listed in the NPPES registry for Frank Aguilar is (312) 926-5924.
- Does Frank Aguilar accept Medicare?
- Frank Aguilar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Frank Aguilar's NPI active?
- Yes — Frank Aguilar's NPI (1659802270) is active in the NPPES registry as of the last update on 2020-07-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.