Casey Mifflin, FNP-BC
NPI 1528737897 · Family Nurse Practitioner · Springfield, IL
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Casey Mifflin, FNP-BC is a Family Nurse Practitioner provider in Springfield, IL (NPI 1528737897).
Provider details
- NPI number
- 1528737897
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-BC
- Sex
- Female
- Sole proprietor
- No
- License
- 209.023982 (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 tenure25% of score
4 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
528 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Pelvic Exam99459 | 122 | $17 |
| Insertion of Temporary Bladder Tube51701 | 66 | $36 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 62 | $104 |
| Non-Needle Measurement and Recording of Electrical Activity of Muscles at Bladder and Bowel Openings51784 | 59 | $36 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 38 | $74 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 35 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiol | 116 | 76 |
| Vibegronbrand: Gemtesa | 42 | — |
| Mirabegronbrand: Myrbetriq | 41 | — |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 26 | 23 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$230 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 701 N 1st StSpringfield, IL 62781-0001Phone: (217) 788-4884
Registry dates
- Enumerated
- 2021-09-09
- Last updated
- 2024-01-29
- Certified
- 2024-01-29
Frequently asked questions
- What is Casey Mifflin's NPI number?
- Casey Mifflin's National Provider Identifier (NPI) is 1528737897, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Casey Mifflin's specialty?
- Casey Mifflin is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Casey Mifflin located?
- Casey Mifflin's practice location on file with NPPES is 751 N Rutledge St Lowr Level, Springfield, IL 62702-4968.
- What is Casey Mifflin's phone number?
- The practice phone number listed in the NPPES registry for Casey Mifflin is (217) 545-8000.
- Does Casey Mifflin accept Medicare?
- Casey Mifflin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Casey Mifflin's NPI active?
- Yes — Casey Mifflin's NPI (1528737897) is active in the NPPES registry as of the last update on 2024-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.