Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Lawrence P Gassner, MD

Individual provider Internal Medicine Physician · NPI 1558379461

Dr. Lawrence P Gassner, MD is an Internal Medicine in Phoenix, Arizona. Graduated from Washington University School of Medicine in 1988, 38 years ago. Practices with Tatum Ridge Internal Medicine PLC, a 4-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Arizona.

Years since qualifying
38
Trained at
Washington University School of Medicine
Licensed in
AZ
In the registry since
2006
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

18404 N Tatum Blvd Ste 205
Phoenix, AZ 85032-1509
Phone: (602) 971-5500
Fax: (602) 944-0504
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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 19150 (AZ)

Record details

NPI number1558379461
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 4, 2006
Last updated in NPPESMarch 22, 2011

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolWASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1988 (38 years in practice)
Group practice Tatum Ridge Internal Medicine Plc — 4 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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