Margo Mcmahon, FNP-BC
NPI 1336381201 · Family Nurse Practitioner · Effingham, IL
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margo Mcmahon, FNP-BC is a Family Nurse Practitioner provider in Effingham, IL (NPI 1336381201).
Provider details
- NPI number
- 1336381201
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-BC
- Sex
- Female
- Sole proprietor
- No
- License
- 209007512 (IL)
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
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
151 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) |
|---|---|---|
| Automated Urinalysis Test81003 | 66 | $2 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 57 | $9 |
| Amplifed Dna Or Rna Probe Detection of Severe Acute Respiratory Syndrome Coronavirus 2 (covid-19) Antigen87635 | 17 | $50 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 11 | $73 |
Typical Medicare-allowed amounts for these services range $2–$73 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 47 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 105 | 88 |
| Montelukast Sodium | 81 | 24 |
| Azithromycin | 79 | 73 |
| Hydrochlorothiazide | 66 | 19 |
| Amlodipine Besylate | 66 | 15 |
| Levothyroxine Sodium | 61 | — |
| Doxycycline Hyclate | 57 | 53 |
Practice location
Mailing address
Additional practice locations (1)
- 1303 W Evergreen Ave Ste 202Effingham, IL 62401-1638Phone: (217) 238-4634
Registry dates
- Enumerated
- 2009-03-24
- Last updated
- 2026-03-16
- Certified
- 2026-03-16
Frequently asked questions
- What is Margo Mcmahon's NPI number?
- Margo Mcmahon's National Provider Identifier (NPI) is 1336381201, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margo Mcmahon's specialty?
- Margo Mcmahon is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Margo Mcmahon located?
- Margo Mcmahon's practice location on file with NPPES is 300 N Maple St, Effingham, IL 62401-2003.
- What is Margo Mcmahon's phone number?
- The practice phone number listed in the NPPES registry for Margo Mcmahon is (217) 342-4151.
- Does Margo Mcmahon accept Medicare?
- Margo Mcmahon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margo Mcmahon's NPI active?
- Yes — Margo Mcmahon's NPI (1336381201) is active in the NPPES registry as of the last update on 2026-03-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.