DR. KENNETH SANFORD BLUMENFELD M.D.
NPI 1235158254
Specialist in San Jose, CA

Q: What is Kenneth Blumenfeld's NPI number?

The NPI number for Kenneth Blumenfeld is 1235158254. It was assigned to this individual provider in the NPPES registry on July 19, 2006.

Q: What is Kenneth Blumenfeld's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Active since July 19, 2006PECOS EnrolledAccepts Medicare Assignment

2577 SAMARITAN DR, SUITE 710, SAN JOSE, CA 95124(408) 358-0133(408) 358-8134 Get Directions Write a Review

NPPES record last updated: August 21, 2012. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dr. Kenneth Sanford Blumenfeld M.d. NPPES

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

DR. KENNETH SANFORD BLUMENFELD M.D. (NPI 1235158254) is an individual specialist in San Jose, California, licensed in California (A50900) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Johns Hopkins University School Of Medicine (1986).

NPPES Registry Identity

NPI1235158254

Entity TypeIndividualMale

Primary Taxonomy174400000X

Provider Legal NameDR. KENNETH SANFORD BLUMENFELDCredential: M.D.

Location Address2577 SAMARITAN DR, SUITE 710San Jose, CA 95124-4100

Mailing Address2577 Samaritan Dr, Suite 710San Jose, CA 95124-4100 · (408) 358-0133 · Fax (408) 358-8134

Phone(408) 358-0133

Fax(408) 358-8134

Sole ProprietorYes

Medical School CMSJohns Hopkins University School Of MedicineGraduated 1986

Enumeration DateJuly 19, 2006

Last NPPES UpdateAugust 21, 2012

✔ NPI 1235158254 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers

Taxonomy Code174400000X

License✔ Licensed in CA · A50900

Definition

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

2577 SAMARITAN DR, San Jose, CA 95124

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Other Identifiers 3

Medicaid000A509000CA

Medicare PINZZZ00841ZCA

Medicare UPINF39066CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Kenneth Sanford Blumenfeld M.d. 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 ID4082668041

PECOS Enrollment IDI20050315000433

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.

Medicare Billing Reassignment

Medicare enrollment records show Kenneth Blumenfeld reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Sutter Bay Medical Foundation

Same address

Ambulatory Surgical

2581 SAMARITAN DR, SUITE 308
San Jose, CA 95124

Reassigned Medicare billing, California enrollment
Also billed through NPI 1982845186 (California), NPI 1013950807 (California)
393 clinicians in this Medicare group

NPI 1043654486 (408) 876-4800

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 8

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.

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

119 services119 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

113 services86 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

45 services23 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

33 services30 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

24 services23 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

22 services22 patients

Other Providers at the Same Location NPPES 20

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

DR. MARJORIE FROST MCCRACKEN MD PHD

Pediatrics (Pediatric Gastroenterology)

2577 SAMARITAN DR, STE 815
SAN JOSE, CA 95124

Santa Clara County (408) 358-3573

CLAUDIA REAY M.D.

Pediatrics

2577 SAMARITAN DR, SUITE830
SAN JOSE, CA 95124

Santa Clara County (408) 356-1319

BRYAN J DRUCKER M.D.

Pediatrics

2577 SAMARITAN DR, SUITE 830
SAN JOSE, CA 95124

Santa Clara County (408) 356-1319

AMI A. SHETH DPM

Podiatrist

2577 SAMARITAN DR, SUITE 840
SAN JOSE, CA 95124

Santa Clara County (408) 358-6234

PARVEZ AHMED M.D.

Pediatrics

2577 SAMARITAN DR, SUITE # 725
SAN JOSE, CA 95124

Santa Clara County (408) 358-2755

FRED AND MARY MANSUBI, M.D. A PROFESSIONAL MEDICAL CORPORATION

Pediatrics (Pediatric Allergy/Immunology)

2577 SAMARITAN DR, SUITE 860
SAN JOSE, CA 95124

Santa Clara County (408) 358-2627

NOOR SACHDEV

Psychiatry & Neurology (Neurology)

2577 SAMARITAN DR, SUITE #840
SAN JOSE, CA 95124

Santa Clara County (408) 356-9029

SOUTH BAY BRAIN AND SPINE

Specialist

2577 SAMARITAN DR, SUITE 710
SAN JOSE, CA 95124

Santa Clara County (408) 358-0133

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 Kenneth Blumenfeld's NPI number?

The NPI number for Kenneth Blumenfeld is 1235158254. It was assigned to this individual provider in the NPPES registry on July 19, 2006.

Where is Kenneth Blumenfeld located?

Kenneth Blumenfeld practices at 2577 Samaritan Dr Suite 710, San Jose, CA 95124. The listed phone number is (408) 358-0133.

What is Kenneth Blumenfeld's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Kenneth Blumenfeld enrolled in Medicare?

Yes. Kenneth Blumenfeld 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.

Which organization bills Medicare for Kenneth Blumenfeld's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Kenneth Blumenfeld reassigns Medicare benefits to Sutter Bay Medical Foundation (San Jose, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Kenneth Blumenfeld's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Kenneth Blumenfeld was last updated on August 21, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.