JOHN M HASSLER M.D.
NPI 1306928700
Psychiatry & Neurology - Psychiatry in La Jolla, CA

Q: What is John Hassler's NPI number?

The NPI number for John Hassler is 1306928700. It was assigned to this individual provider in the NPPES registry on October 19, 2006.

Q: What is John Hassler's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Q: When was this NPI record last updated?

The NPPES record for John Hassler was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since October 19, 2006PECOS Enrolled

1223 ROSLYN LN, LA JOLLA, CA 92037(858) 454-9341 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About John M Hassler M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN M HASSLER M.D. (NPI 1306928700) is an individual psychiatry provider in La Jolla, California, licensed in California (G15132) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1306928700

Entity TypeIndividualMale

Primary Taxonomy2084P0800X

Provider Legal NameJOHN M HASSLERCredential: M.D.

Location Address1223 ROSLYN LNLa Jolla, CA 92037-3648

Mailing Address733 Muirlands Vista WayLa Jolla, CA 92037-6202 · (858) 454-8575

Phone(858) 454-9341

Sole ProprietorYes

Enumeration DateOctober 19, 2006

Last NPPES UpdateJuly 8, 2007

✔ NPI 1306928700 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

License✔ Licensed in CA · G15132

Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

1223 ROSLYN LN, La Jolla, CA 92037

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

John M Hassler M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer– Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92037 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$184.71 typical visit price

range $62.10 – $184.71

Typical copayment $46.17 (range $15.52 – $46.17)

Most-billed visit code 99205

Established Patient

$76.87 typical visit price

range $20.62 – $151.42

Typical copayment $19.21 (range $5.15 – $37.85)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JOHN M. HASSLER, M.D., INC

Psychoanalyst

1223 ROSLYN LN
LA JOLLA, CA 92037

San Diego County (858) 454-9341

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Hassler's NPI number?

The NPI number for John Hassler is 1306928700. It was assigned to this individual provider in the NPPES registry on October 19, 2006.

Where is John Hassler located?

John Hassler practices at 1223 Roslyn Ln, La Jolla, CA 92037. The listed phone number is (858) 454-9341.

What is John Hassler's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is John Hassler enrolled in Medicare?

Yes. John Hassler is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for John Hassler was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.