Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Nicholas Withrow Greco, MD

Individual provider Emergency Medicine Physician · NPI 1023325289

Dr. Nicholas Withrow Greco, MD is an Emergency Medicine in Pasadena, California. Qualified in 2009, 17 years ago. Practices with Hmh Emergency Medical Group, Inc, a 56-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
17
Licensed in
CA
In the registry since
2010
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

100 W California Blvd
Pasadena, CA 91105-3010
Phone: (626) 397-5112
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence A113953 (CA)

Record details

NPI number1023325289
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedSeptember 9, 2010
Last updated in NPPESAugust 21, 2013
Mailing address100 W California Blvd, Pasadena, CA 91105-3010

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 2009 (17 years in practice)
Group practice Hmh Emergency Medical Group, Inc. — 56 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

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