Ann-Marie Tantoco, MD
NPI 1366686586 · Hospitalist Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ann-Marie Tantoco, MD is a Hospitalist Physician provider in Chicago, IL (NPI 1366686586).
Provider details
- NPI number
- 1366686586
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036.146534 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 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
238 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 | 164 | $84 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 35 | $122 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 21 | $127 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 18 | $141 |
Typical Medicare-allowed amounts for these services range $84–$141 (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.
Practice location
Mailing address
Additional practice locations (1)
- 225 E Chicago AveChicago, IL 60611-2991Phone: (312) 227-7413
Registry dates
- Enumerated
- 2009-05-01
- Last updated
- 2021-11-03
- Certified
- 2021-11-03
Frequently asked questions
- What is Ann-Marie Tantoco's NPI number?
- Ann-Marie Tantoco's National Provider Identifier (NPI) is 1366686586, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ann-Marie Tantoco's specialty?
- Ann-Marie Tantoco is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Ann-Marie Tantoco located?
- Ann-Marie Tantoco's practice location on file with NPPES is 251 E Huron St, Chicago, IL 60611.
- What is Ann-Marie Tantoco's phone number?
- The practice phone number listed in the NPPES registry for Ann-Marie Tantoco is (312) 926-5924.
- Does Ann-Marie Tantoco accept Medicare?
- Ann-Marie Tantoco is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ann-Marie Tantoco's NPI active?
- Yes — Ann-Marie Tantoco's NPI (1366686586) is active in the NPPES registry as of the last update on 2021-11-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.