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DR. JASON LEE MASSA D.O.
NPI 1841636156
Psychiatry & Neurology - Neurology in Walnut Creek, CA

Active since May 14, 2013PECOS EnrolledAccepts Medicare Assignment
100/100
CMS Quality Rating
675 YGNACIO VALLEY RD, STE A102, WALNUT CREEK, CA 94596(925) 938-5252(925) 938-1343 Get Directions Write a Review

NPPES record last updated: October 2, 2020. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Oct 2, 2020, Jun 4, 2019 (2 updates tracked since 2019).

About Dr. Jason Lee Massa D.o. NPPES

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

DR. JASON LEE MASSA D.O. (NPI 1841636156) is an individual neurology provider in Walnut Creek, California, licensed in California (20A13615) and active in the NPI registry since May 2013. He is enrolled in Medicare PECOS and is a graduate of Other (2013).

NPPES Registry Identity

NPI1841636156
Entity TypeIndividualMale
Primary Taxonomy2084N0400X
Provider Legal NameDR. JASON LEE MASSACredential: D.O.
Location Address675 YGNACIO VALLEY RD, STE A102Walnut Creek, CA 94596-3882
Mailing Address675 Ygnacio Valley Rd, Ste A102Walnut Creek, CA 94596-3882 · (925) 938-5252 · Fax (925) 938-1343
Phone(925) 938-5252
Fax(925) 938-1343
Sole ProprietorNo
Medical School CMSOtherGraduated 2013
Enumeration DateMay 14, 2013
Last NPPES UpdateOctober 2, 20202 updates tracked since enumeration
NPPES CertifiedOctober 2, 2020
✔ NPI 1841636156 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians
Taxonomy Code2084N0400X
License✔ Licensed in CA · 20A13615
Definition
A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.
675 YGNACIO VALLEY RD, Walnut Creek, CA 94596
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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. Jason Lee Massa 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 ID9830496272
PECOS Enrollment IDI20190701000588
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.

Areas of Expertise CMS Part B claims 3

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 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.
191 services114 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.
64 services51 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
25 services25 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94596 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

100/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality100
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 14

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

THOMAS M. CALLAN OD
Optometrist
675 YGNACIO VALLEY RD, SUITE B103
WALNUT CREEK, CA 94596
Contra Costa County (925) 933-0270
JONATHAN GELERIS D.D.S.
Dentist (General Practice)
675 YGNACIO VALLEY RD, B105
WALNUT CREEK, CA 94596
Contra Costa County (925) 813-0402
AVCARE - SENIORS IN-HOME HELPMATES
In Home Supportive Care
675 YGNACIO VALLEY RD, STE B-108
WALNUT CREEK, CA 94596
Contra Costa County (800) 557-4905
MING FANG MD INC
Internal Medicine (Gastroenterology)
675 YGNACIO VALLEY RD, SUITE 215
WALNUT CREEK, CA 94596
Contra Costa County (925) 776-7600
MARIDEZ BRINAS JENKINS F.N.P.
Nurse Practitioner (Family)
675 YGNACIO VALLEY RD
WALNUT CREEK, CA 94596
Contra Costa County (650) 692-9751
DR. NICHOLAS HUGHES HYDE MD
Phlebology
675 YGNACIO VALLEY RD, SUITE B214
WALNUT CREEK, CA 94596
Contra Costa County (925) 937-8346
INSIGHT VISION CARE OPTOMETRY
Optometrist
675 YGNACIO VALLEY RD, #B103
WALNUT CREEK, CA 94596
Contra Costa County (925) 933-4700
MING FANG MD
Internal Medicine (Gastroenterology)
675 YGNACIO VALLEY RD, SUITE 215
WALNUT CREEK, CA 94596
Contra Costa County (925) 776-7600

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 Jason Massa's NPI number?

The NPI number for Jason Massa is 1841636156. It was assigned to this individual provider in the NPPES registry on May 14, 2013.

Where is Jason Massa located?

Jason Massa practices at 675 Ygnacio Valley Rd Ste A102, Walnut Creek, CA 94596. The listed phone number is (925) 938-5252.

What is Jason Massa's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Is Jason Massa enrolled in Medicare?

Yes. Jason Massa 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 Jason Massa was last updated on October 2, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.