Provider Profile
Listed in the NPI registry as an advanced practice midwife, Sharon Greiner, MSN, CNM, FNP-BC practices in Merrillville, IN. Sharon is also listed as specializing in nurse practitioner — family. According to Medicare claims data, Sharon cared for 69 Medicare patients across 84 services. The services billed most often include detection test by immunoassay with direct visual observation for influenza virus, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19).
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
6901 BROADWAY
Merrillville, IN 46410
1923 W Glen Park Ave
Griffith, IN 46319
Within Certified Nurse-Midwife generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Most searched conditions
Breast health
Breastfeeding
Fertility
Gynecologic pain
Gynecology
Hormonal disorders
Infections
Menopause & Aging
Menstruation
Mental health
Pelvic health
Postpartum
Postpartum health
Pregnancy
Pregnancy complications
Sexual health
Sexually transmitted infections
Urinary tract
Vaginal symptoms
Most searched procedures
Birth control
Breastfeeding
Contraception
Diagnostic testing
Diagnostics
Family planning
Gynecologic care
Gynecology
Imaging
Immunization
Labor & Delivery
Labor & delivery
Lactation & Feeding
Menopause & Aging
Minor procedures
Newborn care
Postpartum
Pregnancy care
Prenatal care
Reproductive health
Screening & prevention
84 services · 69 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Detection test by immunoassay with direct visual observation for influenza virus | Lab test | 87804 |
30 | Too few peers to compare |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
24 | As often as other peers in Advanced Practice Midwife |
| Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) | Lab test | 87811 |
16 | Too few peers to compare |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
14 | Less often than most peers in Advanced Practice Midwife |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Sharon Greiner, MSN, CNM is an advanced practice midwife in Merrillville, IN. That is the designation recorded for this NPI in the federal registry.
NPI registry
Sharon Greiner, MSN, CNM is listed at 6901 Broadway, Merrillville, IN 46410. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
The number on file is (219) 763-8112. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
Sharon Greiner, MSN, CNM's National Provider Identifier is 1477218444. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Sharon Greiner, MSN, CNM attended Other, graduating in 2021. This comes from the CMS National Downloadable File.
CMS public data
Sharon Greiner, MSN, CNM has 5 years experience. Calculated from a graduation year of 2021, reported in the CMS National Downloadable File.
CMS public data
According to Medicare billing data, Sharon Greiner, MSN, CNM the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Not yet. This profile is built from public federal data and has not been confirmed by Sharon Greiner, MSN, CNM. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.