Sharon Greiner, MSN, CNM ,FNP-BC
NPI 1477218444 · Advanced Practice Midwife · Merrillville, IN
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sharon Greiner, MSN, CNM ,FNP-BC is a Advanced Practice Midwife provider in Merrillville, IN (NPI 1477218444).
Provider details
- NPI number
- 1477218444
- Entity type
- Individual
- Primary specialty
- Advanced Practice MidwifePhysician Assistants & Advanced Practice Nursing Providers
- Credential
- MSN, CNM ,FNP-BC
- Sex
- Female
- Sole proprietor
- No
- License
- 71012214A (IN)
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
4 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
84 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) |
|---|---|---|
| Detection Test By Immunoassay With Direct Visual Observation for Influenza Virus87804 | 30 | $16 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 24 | $72 |
| Detection Test By Immunoassay With Direct Visual Observation for Severe Acute Respiratory Syndrome Coronavirus 2 (covid-19)87811 | 16 | $41 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 14 | $101 |
Typical Medicare-allowed amounts for these services range $16–$101 (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 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 13 | 12 |
| Cephalexin | 13 | 12 |
| Prednisone | 11 | 11 |
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.
Practice location
Mailing address
Additional practice locations (1)
- 1923 W Glen Park AveGriffith, IN 46319-3703Phone: (219) 922-2535
Registry dates
- Enumerated
- 2021-11-04
- Last updated
- 2024-09-12
- Certified
- 2024-09-12
Frequently asked questions
- What is Sharon Greiner's NPI number?
- Sharon Greiner's National Provider Identifier (NPI) is 1477218444, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sharon Greiner's specialty?
- Sharon Greiner is listed in the NPPES registry with a primary specialty of Advanced Practice Midwife (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Sharon Greiner located?
- Sharon Greiner's practice location on file with NPPES is 6901 Broadway, Merrillville, IN 46410-3535.
- What is Sharon Greiner's phone number?
- The practice phone number listed in the NPPES registry for Sharon Greiner is (219) 763-8112.
- Does Sharon Greiner accept Medicare?
- Sharon Greiner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sharon Greiner's NPI active?
- Yes — Sharon Greiner's NPI (1477218444) is active in the NPPES registry as of the last update on 2024-09-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.