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DR. JOHN KARL KONSTANTIN M.D., M.P.H.
NPI 1548415979
General Practice in Oakland, CA

Active since November 26, 2008PECOS EnrolledAccepts Medicare AssignmentCLIA 05D2061824 · Waiver
2584 MACARTHUR BLVD, OAKLAND, CA 94602(510) 530-5400(510) 530-2921 Get Directions Write a Review

NPPES record last updated: November 26, 2008. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. John Karl Konstantin M.d., M.p.h. NPPES

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

DR. JOHN KARL KONSTANTIN M.D., M.P.H. (NPI 1548415979) is an individual general practice provider in Oakland, California, licensed in California (A102896) and active in the NPI registry since November 2008. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through July 4, 2027, and is a graduate of Drexel University College Of Medicine (2006).

NPPES Registry Identity

NPI1548415979
Entity TypeIndividualMale
Primary Taxonomy208D00000X
Provider Legal NameDR. JOHN KARL KONSTANTINCredential: M.D., M.P.H.
Location Address2584 MACARTHUR BLVDOakland, CA 94602-2928
Mailing Address2584 Macarthur BlvdOakland, CA 94602-2928 · (510) 530-5400 · Fax (510) 530-2921
Phone(510) 530-5400
Fax(510) 530-2921
Sole ProprietorYes
Medical School CMSDrexel University College Of MedicineGraduated 2006
Enumeration DateNovember 26, 2008
✔ NPI 1548415979 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyGeneral PracticeAllopathic & Osteopathic Physicians
Taxonomy Code208D00000X
License✔ Licensed in CA · A102896
Definition
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee
2584 MACARTHUR BLVD, Oakland, CA 94602
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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. John Karl Konstantin M.d., M.p.h. 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 ID9638343510
PECOS Enrollment IDI20111111000460
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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 05D2061824

John K Konstantin MD · Oakland, CA
Active · expires Jul 4, 2027
CLIA Number05D2061824
Laboratory TypePhysician Office
Certificate Effective DateJuly 5, 2025
Certificate Expiration DateJuly 4, 2027
Laboratory DirectorJohn K. Konstantin
Laboratory Phone(510) 530-5400
Laboratory LocationJohn K Konstantin MD2584 Macarthur Blvd, Oakland, CA 94602
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
250 services55 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
36 services36 patients

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
8 suppliers15 claims33 services$5.33 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Konstantin's NPI number?

The NPI number for John Konstantin is 1548415979. It was assigned to this individual provider in the NPPES registry on November 26, 2008.

Where is John Konstantin located?

John Konstantin practices at 2584 Macarthur Blvd, Oakland, CA 94602. The listed phone number is (510) 530-5400.

What is John Konstantin's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

Is John Konstantin enrolled in Medicare?

Yes. John Konstantin 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.

Does John Konstantin hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 05D2061824) is associated with this NPI, valid through July 4, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for John Konstantin was last updated on November 26, 2008. NPI Profile syncs with the weekly NPPES data releases published by CMS.