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

Dr. Steven Jerome McAllen, MD

Individual provider Internal Medicine Physician · NPI 1821081043

Dr. Steven Jerome McAllen, MD is an Internal Medicine in Templeton, California. Graduated from University of California, San Diego School of Medicine in 1986, 40 years ago. Practices with David B. Hammer, a 116-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
40
Trained at
University of California, San Diego School of Medicine
Licensed in
CA
In the registry since
2005
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

295 Posada Ln Ste C
Templeton, CA 93465-4055
Phone: (805) 434-1166
Fax: (805) 434-3279
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G061667 (CA)

Record details

NPI number1821081043
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 23, 2005
Last updated in NPPESMarch 1, 2010
Mailing address295 Posada Ln, Suite C, Templeton, CA 93465-4055

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, SAN DIEGO SCHOOL OF MEDICINE
Graduated 1986 (40 years in practice)
Group practice David B. Hammer — 116 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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