2026 data CMS NPPES NUCC Taxonomy

Doctors in Merrillville, IN

Compiled from official public sources by the PlainDoctor editorial team.

Active healthcare providers in Merrillville sourced from the CMS NPPES weekly file, no proprietary ratings, no editorial scores. NPI counts, specialty distribution, and primary practice addresses refreshed each release.

1,935
Providers
CMS NPPES-registered
20
Specialties
NUCC taxonomy codes
Behavior Technician
Top specialty
607 providers
Indiana
State
IN

1,935 healthcare providers across 20 specialties

Merrillville, Indiana appears in the CMS National Plan and Provider Enumeration System with 1,935 registered healthcare providers spanning 20 distinct NUCC-taxonomy specialties. This count includes every individual clinician who has applied for an NPI and listed a practice address in Merrillville - physicians, dentists, nurse practitioners, physician assistants, chiropractors, physical therapists, optometrists, psychologists, podiatrists, and every other credentialed provider type CMS tracks. It does not measure hospital beds, urgent-care capacity, or whether a given clinic is accepting new patients; it measures the pool of professionals with current NPI enrollment and a Merrillville practice location on file. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2023 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.

The provider mix in Merrillville is weighted toward Behavior Technician (607 clinicians, followed by Counselor with 104 and Mental Health Counselor with 103). That distribution reflects how NPPES records specialty: providers self-select a primary taxonomy code, so a family physician who also practices geriatrics will show up under whichever NUCC code they registered first. Relative to Indiana's population, Merrillville reports roughly 28.2 providers per 100,000 residents using the state-level denominator, which is a rough proxy rather than a precise access-to-care measurement; the true catchment area of any {cityName} clinician extends beyond the municipal boundary.

Within Indiana, Merrillville ranks #12 of 265 cities tracked by provider count, accounting for 1.7% of the state's registered providers. Of Indiana's most common specialties, Speech-Language Pathologist is the most prominent one with no provider currently listing a Merrillville practice address, a coverage gap Merrillville patients typically fill by traveling to a larger nearby hub.

For Merrillville patients, this directory is most useful as a starting shortlist, searching by specialty narrows the 690-taxonomy roster to clinicians with the relevant training, and each provider page links to NPI, state licensing boards, and the NPPES registry for credential verification. Important: PlainDoctor is a directory of publicly available CMS government data, not a review site, a ranking, or medical advice. NPPES data is self-reported and refreshed monthly, so listing details may be out of date; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients. Nothing on this page substitutes for consulting a licensed clinician about your personal health decisions.

1,935
Providers
20
Specialties
#12
of 265 IN cities
1.7%
of IN providers
28.2
Per 100K (state)

Which specialties are most common in Merrillville

Behavior Technician 607
Counselor 104
Mental Health Counselor 103
Clinical Social Worker 74
Physical Therapist 53
Pharmacist 51
Family Nurse Practitioner 50
Social Worker 45
Behavior Analyst 44
Family Medicine Physician 32
Optometrist 32
Case Manager/Care Coordinator 28
Occupational Therapist 25
Addiction (Substance Use Disorder) Counselor 25
Internal Medicine Physician 24
Student in an Organized Health Care Education/Training Program 23
Registered Nurse 23
Dentist 23
Clinical Psychologist 23
Nurse Practitioner 19

Healthcare Providers (Page 26)

Name
Joelle Niemzyk
Speech-Language Assistant
Christopher Nieves-O'Brien
Behavior Technician
Sarah Nock, M.S.W
Mental Health Counselor
Linnae Nolen
Behavior Technician
Tracy Noorlag, LAC
Addiction (Substance Use Disorder) Counselor
Ariel Noriega
Behavior Technician
Rebecca Norman
Behavior Technician
Amari Norwood
Developmental Therapist
Danielle Norwood, RBT
Behavior Technician
Jordan Novak, MM, MT-BC
Music Therapist
Erica Nowak
Behavior Technician
Julie Nyhus, FNP
Family Medicine Physician
Paul Nyongani, M.D.
Surgery Physician
Joanne O'Connor, PHARMD
Pharmacist
Martha O'Danovich, PSYD
Psychologist
David O'Donnell
Counselor
Alexandra O'Keefe, RBT
Behavior Technician
Erin O'Malley
Occupational Therapist
Tanisha O'Neal, RBT
Behavior Technician
Brandon O'Neil
Behavior Technician
Riley O'Neil
Behavior Technician
Victorio O'Yek, M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
Henry Obed
Adult Companion
Snezana Obetkovski, PHARMACIST
Pharmacist
Carly Oboikovitz, DPT
Physical Therapist
Ava Ochoa
Speech-Language Pathologist
Caroline Odom
Clinical Social Worker
Busola Ogundipe
Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist
Mayumi Oka, MD
Diagnostic Radiology Physician
Vitus Okereke
Physical Therapist
Luwanga Okoro, D.O
Cardiovascular Disease Physician
Patricia Olson, MS RNC WHNP
Women's Health Nurse Practitioner
Zakieh Omari, RBT
Behavior Technician
Kelli Ommundson
Behavior Technician
Jude Ondrus, OTR/L
Occupational Therapist
Richard Oni, MD INC
Orthopaedic Surgery Physician
Corinne Oprinovich
Mental Health Counselor
Joelle Opyt, MS., BCBA
Assistant Behavior Analyst
Natalie Ordonez
Behavior Technician
Nicole Orr, RBT
Behavior Technician
Darcy Orzech, LCSW
Clinical Social Worker
Geneva Osawe, LCSW, LMFT
Clinical Social Worker
Douglas Osborn, PHARMD
Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist
Nicole Ostrozovich-Lapointe, RN
Registered Nurse
Reginald Owens
Mental Health Counselor
Tarangini Padhya, MD
Internal Medicine Physician
Tushar Padhya, MD
Anatomic Pathology & Clinical Pathology Physician
Jennifer Pallone, D.O.
Neurology Physician
Milisava Pamucar, PHARMD
Pharmacist
Gianna Paolilli
Behavior Technician

Nearby Cities in Indiana

Other Indiana cities with provider coverage in the CMS NPPES registry.

Compare specialties side-by-side →

Frequently Asked Questions

How many doctors are in Merrillville, IN?
There are 1,935 registered healthcare providers in Merrillville, IN, covering 20 specialties. This includes physicians, dentists, therapists, and other licensed providers.
What are the most common medical specialties in Merrillville?
The most common specialties in Merrillville are Behavior Technician, Counselor, Mental Health Counselor, Clinical Social Worker, Physical Therapist. Behavior Technician has the most providers with 607.

Provider data from CMS NPPES (download.cms.gov/nppes); specialty classification from NUCC Health Care Provider Taxonomy. PlainDoctor does not rate or rank providers. Methodology · About

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from CMS National Plan and Provider Enumeration System (NPPES). Consult a qualified professional before making decisions based on this data.

Compiled from official public sources by the PlainDoctor editorial team.