Cynthia Mastbrook, D.O.
NPI 1881746311 · Anesthesiology Physician · Palos Heights, IL
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cynthia Mastbrook, D.O. is a Anesthesiology Physician provider in Palos Heights, IL (NPI 1881746311).
Provider details
- NPI number
- 1881746311
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- 036-088690 (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
19 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
202 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 Lens Surgery00142 | 57 | $133 |
| Anesthesia for Other Procedure on Large Bowel Using an Endoscope00811 | 40 | $131 |
| Anesthesia for Exam of Colon Using an Endoscope00812 | 39 | $110 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 30 | $144 |
| Anesthesia for Procedure on Small and Large Bowel Using an Endoscope00813 | 24 | $170 |
| Anesthesia for Other Closed Procedure on Chest00520 | 12 | $168 |
Typical Medicare-allowed amounts for these services range $110–$170 (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)
- 2211 N. Oak Park AvenueChicago, IL 60707-3392Phone: (773) 385-5877Fax: (773) 385-5488
Registry dates
- Enumerated
- 2007-01-17
- Last updated
- 2022-08-23
- Certified
- 2022-08-23
Frequently asked questions
- What is Cynthia Mastbrook's NPI number?
- Cynthia Mastbrook's National Provider Identifier (NPI) is 1881746311, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cynthia Mastbrook's specialty?
- Cynthia Mastbrook is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Cynthia Mastbrook located?
- Cynthia Mastbrook's practice location on file with NPPES is 12251 S 80th Ave, Palos Heights, IL 60463-1290.
- What is Cynthia Mastbrook's phone number?
- The practice phone number listed in the NPPES registry for Cynthia Mastbrook is (708) 923-3936.
- Does Cynthia Mastbrook accept Medicare?
- Cynthia Mastbrook is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Cynthia Mastbrook's NPI active?
- Yes — Cynthia Mastbrook's NPI (1881746311) is active in the NPPES registry as of the last update on 2022-08-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.