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Dr. Jason Lee Massa, DO
NPI1841636156PAC ID9830496272
- Medicare services, 2024
- 527
- Medicare patients, 2024
- 160
- Part D claims, 2024
- 936
- Publications
- 1
- MIPS score, 2024
- 93
- Practice address
- 675 Ygnacio Valley Rd, Walnut Creek, CA 94596
- Practice phone
- Call (925) 938-5252
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
East Bay Neurology, Inc.
Walnut Creek, California
Find Dr. Massa's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Jason Lee Massa is a neurologist in Walnut Creek, California
Dr. Massa practices at East Bay Neurology, Inc. in Walnut Creek, California.
Dr. Massa's NPI, 1841636156, was assigned on May 14, 2013. Dr. Massa graduated from Touro University California - Vallejo in 2013. Dr. Massa holds California license 20A13615.
NPI and contact details
- NPI
- 1841636156NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9830496272
- NPI enumeration date
- May 14, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (925) 938-5252
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jason Lee Massa practices at East Bay Neurology, Inc. in Walnut Creek, California
Dr. Massa's primary practice is East Bay Neurology, Inc., at 675 Ygnacio Valley Rd, Walnut Creek, CA 94596 in Contra Costa County. The practice phone is (925) 938-5252.
- East Bay Neurology, Inc.675 Ygnacio Valley Rd, Walnut Creek, CA 94596 · Contra Costa CountyPhone(925) 938-5252
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Jason Lee Massa is affiliated with 5 sites of care and 2 medical groups
Dr. Massa's primary practice is East Bay Neurology, Inc. in Walnut Creek, California. Dr. Massa is also affiliated with John Muir Medical Center, Walnut Creek. The medical group on file is East Bay Neurology. Dmand AI also links Dr. Massa to 2 more hospitals, 1 group practice or clinic and 1 medical group, each named with a free account.
East Bay Neurology, Inc.Primary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Jason Lee Massa's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Massa practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| East Bay Neurology, Inc. | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jason Lee Massa is one of 2,207 neurologists in California
Neurology is Dr. Massa's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Massa is board certified in neurology by the American Board of Psychiatry and Neurology. Dr. Massa is licensed in California.
Specialties and state licenses
- Neurology, CaliforniaPrimary
Clinical focus
Dmand AI lists alzheimer's disease, carpal tunnel syndrome, essential tremor, lower back pain, parkinson's disease and restless legs syndrome among the conditions Dr. Massa treats.
Neurologists near Dr. Massa
Counts of neurologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Jason Lee Massa billed Medicare for 527 services in 2024
CMS data shows 527 Medicare services from Dr. Massa across 4 procedure codes in 2024, for 160 Medicare patients. Medicare paid $41,844 for them. Every service was in an office.
Medicare services, 2024527
Medicare patients160
Paid by Medicare$41,844
Procedure codes4
Dr. Massa's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2702024: 2804%
- Other services
- 2023: 122024: 2471958%
Dr. Massa compared with the California median for neurologists, 2024
- Dr. Massa
- California median
- Medicare services
- 527vs 40430% above
- Medicare patients
- 160vs 19016% below
- Part D claims
- 842vs 3242.6 times
Medians across 1,995 neurologists in California with Dmand AI profiles that report each measure.
Dr. Massa's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Massa?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Massa and other neurologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jason Lee Massa treated 160 Medicare patients in 2024, average age 76
CMS counts 160 Medicare patients who saw Dr. Massa in 2024. The largest group is 75 to 84, with 76 patients. 75% of them have high cholesterol, and 69% have parkinson's disease. Their average risk score is 1.41, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Massa's median patient age at 71, with 52% women.
Medicare patients, 2024160
Average age76
Average risk score1.41
Dr. Massa's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Massa's Medicare patients by sex, 2024
- Women6843%
- Men9257%
Chronic conditions among Dr. Massa's Medicare patients, 2024
- High cholesterol75%
- Parkinson's disease69%
- High blood pressure65%
- Mood disorders37%
- Depression33%
- Arthritis31%
- Anxiety28%
- Ischemic heart disease28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Massa's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women52%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jason Lee Massa wrote 936 Medicare Part D claims in 2024
In 2024, Dr. Massa wrote 936 Medicare Part D claims for 134 patients. 86% of them were for generic drugs. CMS names the drug for 842 of them, across 18 drugs with 11 or more claims each, at $337,578 in total drug cost. In 2023, CMS named 605 claims across 14 drugs.
Part D claims, 2024936
Drugs named by CMS18
Total drug cost$337,578
Part D patients134
Dr. Massa's Part D claims by kind of drug, 2024
- Generic803 claims86%
- Brand-name133 claims14%
Dr. Massa's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Massa's Part D claims, 2024
- Antipsychotics, patients 65 and over2%17 of 936 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 6052024: 84239%
Drugs named by CMS: 18 in 2024, 14 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Jason Lee Massa scored 93 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 93 out of 100 for Dr. Massa for performance year 2024, reported as part of a group. Dr. Massa accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Massa as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Massa's MIPS scores, performance year 2024
- 93of 100Final score
- 100of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 77of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Jason Lee Massa has 1 publication on record
Dmand AI links 1 paper to Dr. Massa. Dr. Massa's most frequent co-author is Lana Marie Chahine, MD.
Papers1
Dr. Massa's most frequent co-authors
Recent publications by Dr. Massa
See who Dr. Massa researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Massa works with, so you can find a warm path to the right neurologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Jason Lee Massa received $7,320 in industry payments from 2016 to 2025
CMS Open Payments shows 148 general payments to Dr. Massa from 18 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 68% of the total. Amneal Pharmaceuticals LLC paid the most, $1,610.
General payments to Dr. Massa by program year, 2016 to 2025
General payments to Dr. Massa by kind, 2016 to 2025
$7.3Kin total
- Food and beverage$4,99968%
- Education$1,27517%
- Travel and lodging$1,04614%
Companies that paid Dr. Massa the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jason Lee Massa graduated from Touro University California - Vallejo
Dr. Massa graduated from Touro University California - Vallejo in 2013.
- Medical school
- Board certified in neurology
- Board certified in 2014 - 2026
- Board certified in 2017 - 2020
Source: Dmand AI Professional Profile Data
Dr. Jason Lee Massa accepts plans from 15 insurance carriers
Dr. Massa is in network with 15 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Humana
- Regence Health Plans
- +7 more carriersWith a free account
Plan types Dr. Massa accepts, by number of carriers
- Medicare10
- PPO9
- HMO6
- POS5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. Jason Lee Massa's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Jason Lee Massa
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Jason Lee Massa's NPI number?
Dr. Jason Lee Massa's NPI number is 1841636156. It was assigned on May 14, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Jason Lee Massa?
Dr. Jason Lee Massa is a neurologist in Walnut Creek, California. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. Jason Lee Massa practice?
Dr. Massa practices at 675 Ygnacio Valley Rd, Walnut Creek, CA 94596. Dr. Massa's primary practice is East Bay Neurology, Inc. in Walnut Creek, California. Dmand AI also links Dr. Massa to 2 hospitals, 1 group practice or clinic and 1 medical group.
What is Dr. Jason Lee Massa's office phone number?
The practice phone on file for Dr. Massa is (925) 938-5252.
What is Dr. Jason Lee Massa's medical license number?
Dr. Massa holds California license 20A13615.
Which hospitals is Dr. Jason Lee Massa affiliated with?
Dr. Massa is affiliated with John Muir Medical Center, Walnut Creek. Dmand AI links Dr. Massa to 2 more hospitals.
What medical group is Dr. Jason Lee Massa part of?
Dr. Massa is linked to East Bay Neurology. Dmand AI links Dr. Massa to 1 more medical group.
Does Dr. Jason Lee Massa accept Medicare?
Yes. CMS data shows Dr. Massa billed Medicare for 527 services in 2024, and Dr. Massa accepts Medicare assignment.
Does Dr. Jason Lee Massa offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Massa as offering telehealth services.
What is Dr. Jason Lee Massa's MIPS score?
Dr. Massa's MIPS final score for performance year 2024 is 93 out of 100, reported as part of a group.
Show 10 more questionsShow fewer questions
How many Medicare patients does Dr. Jason Lee Massa see?
CMS counts 160 Medicare patients who saw Dr. Massa in 2024, with an average age of 76.
Is Dr. Jason Lee Massa board certified?
Yes. Dr. Massa is board certified in neurology by the American Board of Psychiatry and Neurology.
What services does Dr. Jason Lee Massa bill to Medicare?
In 2024, Dr. Massa's most billed Medicare services were medicare service (G2211), office visit, established patient (99214) and office visit, established patient (99215).
Where did Dr. Jason Lee Massa go to medical school?
Dr. Massa graduated from Touro University California - Vallejo in 2013.
What drugs does Dr. Jason Lee Massa prescribe most?
In 2024 Medicare Part D data, Dr. Massa's most prescribed drugs by claims were Carbidopa-Levodopa, Carbidopa-Levodopa ER and Rytary.
Has Dr. Jason Lee Massa received payments from drug or device companies?
CMS Open Payments shows $7,320 in general payments to Dr. Massa from 18 companies from 2016 to 2025. The largest total came from Amneal Pharmaceuticals LLC.
How long has Dr. Jason Lee Massa been practicing?
Dr. Massa graduated from medical school in 2013, 13 years ago.
Does Dr. Jason Lee Massa do research?
Dmand AI links 1 publication to Dr. Massa.
Who does Dr. Jason Lee Massa publish with?
Dr. Massa's most frequent co-authors are Lana Marie Chahine, MD (1 shared paper).
What insurance does Dr. Jason Lee Massa accept?
Dr. Massa is in network with 15 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
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