Caroline Mcmahon, ARNP
NPI 1811657133 · Nurse Practitioner · Iowa City, IA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Caroline Mcmahon, ARNP is a Nurse Practitioner provider in Iowa City, IA (NPI 1811657133).
Provider details
- NPI number
- 1811657133
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- ARNP
- Sex
- Female
- Sole proprietor
- No
- License
- A164834 (IA)
Specialties & taxonomies
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
4 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
85 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 43 | $165 |
| Subsequent Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, at Least 45 Minutes99310 | 24 | $121 |
| Critical Care, Each Additional 30 Minutes99292 | 18 | $83 |
Typical Medicare-allowed amounts for these services range $83–$165 (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
Registry dates
- Enumerated
- 2021-12-28
- Last updated
- 2022-02-23
- Certified
- 2022-02-23
Frequently asked questions
- What is Caroline Mcmahon's NPI number?
- Caroline Mcmahon's National Provider Identifier (NPI) is 1811657133, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Caroline Mcmahon's specialty?
- Caroline Mcmahon is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Caroline Mcmahon located?
- Caroline Mcmahon's practice location on file with NPPES is 200 Hawkins Dr, Iowa City, IA 52242-1009.
- What is Caroline Mcmahon's phone number?
- The practice phone number listed in the NPPES registry for Caroline Mcmahon is (319) 356-4141.
- Does Caroline Mcmahon accept Medicare?
- Caroline Mcmahon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Caroline Mcmahon's NPI active?
- Yes — Caroline Mcmahon's NPI (1811657133) is active in the NPPES registry as of the last update on 2022-02-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.