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DR. KAREN SPENSER KIEFER D.O.
NPI 1578586574
Psychiatry & Neurology - Psychiatry in Diamond Bar, CA

Active since July 25, 2006PECOS EnrolledAccepts Medicare Assignment
1715 LEANING PINE DR, DIAMOND BAR, CA 91765(909) 261-4123(909) 367-2922 Get Directions Write a Review

NPPES record last updated: August 11, 2020. Verified against the NPPES registry weekly; last sync: August 30, 2026.

About Dr. Karen Spenser Kiefer D.o. NPPES

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

DR. KAREN SPENSER KIEFER D.O. (NPI 1578586574) is an individual psychiatry provider in Diamond Bar, California, licensed in California (20A5060) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS and is a graduate of Midwestern University, Chicago College Of Osteopathic Med (1976).

NPPES Registry Identity

NPI1578586574
Entity TypeIndividualFemale
Primary Taxonomy2084P0800X
Provider Legal NameDR. KAREN SPENSER KIEFERCredential: D.O.
Location Address1715 LEANING PINE DRDiamond Bar, CA 91765-2738
Mailing Address1715 Leaning Pine DrDiamond Bar, CA 91765-2738 · (909) 261-4123 · Fax (909) 367-2922
Phone(909) 261-4123
Fax(909) 367-2922
Sole ProprietorYes
Medical School CMSMidwestern University, Chicago College Of Osteopathic MedGraduated 1976
Enumeration DateJuly 25, 2006
Last NPPES UpdateAugust 11, 2020
NPPES CertifiedAugust 11, 2020
✔ NPI 1578586574 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 · 20A5060
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.
1715 LEANING PINE DR, Diamond Bar, CA 91765
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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 and accepts Medicare assignment

Dr. Karen Spenser Kiefer D.o. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5890876684
PECOS Enrollment IDI20080117000796
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 91765 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
$187.60 typical visit price
range $62.96 – $187.60
Typical copayment $46.90 (range $15.74 – $46.90)
Most-billed visit code 99205
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
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.

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 Karen Kiefer's NPI number?

The NPI number for Karen Kiefer is 1578586574. It was assigned to this individual provider in the NPPES registry on July 25, 2006.

Where is Karen Kiefer located?

Karen Kiefer practices at 1715 Leaning Pine Dr, Diamond Bar, CA 91765. The listed phone number is (909) 261-4123.

What is Karen Kiefer's specialty?

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

Is Karen Kiefer enrolled in Medicare?

Yes. Karen Kiefer is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Karen Kiefer was last updated on August 11, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.