NPPES file of Aug 9, 2026

Doctors and health care providers in Upper Darby, PA

264 individual NPPES records list a practice address in Upper Darby, 141st of 816 Pennsylvania cities. The largest group is pharmacist: 23, 9% of the city's records, against 5% across Pennsylvania. Page 6 of 6.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

The 8 largest groups in Upper Darby

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

Upper Darby in Pennsylvania

  • Rank in Pennsylvania141st of 816 cities by records
  • Share of the state0.1% of Pennsylvania's records
  • Specialties present25 or more taxonomy codes
  • Top three groups20.8% of all records

Compared with Pennsylvania as a whole, Upper Darby has 3.4× the state's share of behavior analyst records.

Providers in Upper Darby, alphabetically

  1. Linsey Will, CRNPObstetrics & Gynecology Nurse Practitioner1891832259
  2. Bryonna Williams, PTAPhysical Therapy Assistant1962353409
  3. Johnston Williams, LBSBehavior Analyst1295103661
  4. Sharell Wilson, LSWSocial Worker1700648748
  5. Jennifer Yankanich, LCSWClinical Social Worker1598557092
  6. Xuan Yin, DMDDentist1134153174
  7. Nickolas YouPharmacist1003111485
  8. Vernell Young, CNANurse's Aide1518185370
  9. Xiaodi YuFamily Medicine Physician1861143240
  10. Yuanyuan Yu, MSWSocial Worker1619405131
  11. Alnetra Zaroe, MBAAdult Companion1861051724
  12. Ellie Zheng, M.D.General Practice Physician1093100141
  13. Kristine Ziemba, PHARMDPharmacist1700249257
  14. Cheryl ZollMental Health Counselor1083081939

The largest Pennsylvania cities

  1. Philadelphia42,849
  2. Pittsburgh28,866
  3. Allentown5,904
  4. Lancaster5,378
  5. Erie5,083

All of Pennsylvania →

How to read this directory

Upper Darby, Pennsylvania appears in the CMS National Plan and Provider Enumeration System with 264 registered healthcare providers spanning 25 or more distinct NUCC-taxonomy specialties. This count includes every individual clinician who has applied for an NPI and listed a practice address in Upper Darby - 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 Upper Darby 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 2024 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.

The provider mix in Upper Darby is weighted toward Pharmacist (23 clinicians, followed by Clinical Social Worker with 17 and General Practice Dentistry with 15). 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 Pennsylvania's population, Upper Darby reports roughly 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.

Of Pennsylvania's most common specialties, Student in an Organized Health Care Education/Training Program is the most prominent one with no provider currently listing a Upper Darby practice address, a coverage gap Upper Darby patients typically fill by traveling to a larger nearby hub.

For Upper Darby patients, this directory is most useful as a starting shortlist. 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; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients.

For informational purposes only; this directory is not medical advice and not a substitute for checking a license. See also: how to find a doctor and how to verify one.

Common questions

How many doctors are in Upper Darby, PA?

There are 264 registered healthcare providers in Upper Darby, PA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Upper Darby?

The most common specialties in Upper Darby are Pharmacist, Clinical Social Worker, General Practice Dentistry, Mental Health Counselor, Social Worker. Pharmacist has the most providers with 23.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov). Records are self-reported registrations, not licenses.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.