Margaret Hartig
NPI 1225120033 · Certified Registered Nurse Anesthetist · Chicago, IL
Enrolled with Medicare as Practitioner - Certified Registered Nurse Anesthetist (crna) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Hartig is a Certified Registered Nurse Anesthetist provider in Chicago, IL (NPI 1225120033).
Provider details
- NPI number
- 1225120033
- Entity type
- Individual
- Primary specialty
- Certified Registered Nurse AnesthetistPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 041308063 (IL)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
22 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) |
|---|---|---|
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 11 | $104 |
| Anesthesia for Other Procedure on Large Bowel Using an Endoscope00811 | 11 | $107 |
Typical Medicare-allowed amounts for these services range $104–$107 (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 (2)
- 1740 W Taylor StChicagoChicago, IL 60612-7232Phone: (866) 600-2273
- 2800 W 95th StEvergreen Park, IL 60805-2701Phone: (708) 422-6200
Registry dates
- Enumerated
- 2006-09-29
- Last updated
- 2018-03-17
Frequently asked questions
- What is Margaret Hartig's NPI number?
- Margaret Hartig's National Provider Identifier (NPI) is 1225120033, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Hartig's specialty?
- Margaret Hartig is listed in the NPPES registry with a primary specialty of Certified Registered Nurse Anesthetist (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Margaret Hartig located?
- Margaret Hartig's practice location on file with NPPES is 676 N Saint Clair St Ste 10-548, Chicago, IL 60611-2927.
- What is Margaret Hartig's phone number?
- The practice phone number listed in the NPPES registry for Margaret Hartig is (312) 695-4387.
- Does Margaret Hartig accept Medicare?
- Margaret Hartig is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Hartig's NPI active?
- Yes — Margaret Hartig's NPI (1225120033) is active in the NPPES registry as of the last update on 2018-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.