Dr. Massuda Atta, MD
- Medicare services, 2021
- 21
- Part D claims, 2023
- 12
- Hospital affiliations
- 1
- Industry payments
- $21
- Medical group
- 1
- Practice address
- 1425 S Main Street, Walnut Creek, CA 94596
- Practice phone
- Call (925) 295-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Atta'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. Massuda Atta is an internist in Walnut Creek, California
Dr. Atta practices at Walnut Creek Medical Center in Walnut Creek, California, part of Kaiser Permanente.
Dr. Atta's NPI, 1528298619, was assigned on July 23, 2009. Dr. Atta holds Massachusetts license 259769.
- NPI
- 1528298619NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2769522515
- NPI enumeration date
- July 23, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (925) 295-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Massuda Atta practices at Walnut Creek Medical Center in Walnut Creek, California
Dr. Atta's primary practice is Walnut Creek Medical Center, at 1425 S Main Street, Walnut Creek, CA 94596 in Contra Costa County. The practice phone is (925) 295-4000.
- Walnut Creek Medical Center1425 S Main Street, Walnut Creek, CA 94596 · Contra Costa CountyPhone(925) 295-4000
Source: Dmand AI Affiliation Data
Dr. Massuda Atta is affiliated with 1 site of care and 1 medical group
Dr. Atta's primary practice is Walnut Creek Medical Center in Walnut Creek, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Massuda Atta's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Atta practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Walnut Creek Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Massuda Atta is one of 16,751 internists in California
Internal medicine is Dr. Atta's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Atta's licenses on file in 2 states: Massachusetts and New Jersey.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
- New Jersey license
Internists near Dr. Atta
Counts of internists 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. Massuda Atta billed Medicare for 21 services in 2021
CMS data shows 21 Medicare services from Dr. Atta across 1 procedure code in 2021. Medicare paid $1,277 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Atta's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 282021: 2125%
Dr. Atta compared with the California median for internists, 2021
- Dr. Atta
- California median
- Medicare services
- 21vs 36194% below
- Part D claims
- 12vs 42197% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Atta's most billed Medicare procedure codes, 2021
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Atta and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Massuda Atta's patients have a median age of 64
Across all payers, Dmand AI patient panel data puts Dr. Atta's median patient age at 64, with 67% women.
Dr. Atta's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women67%
- Men33%
Source: Dmand AI Patient Panel Data
Dr. Massuda Atta wrote 12 Medicare Part D claims in 2023
In 2023, Dr. Atta wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $111 in total drug cost. In 2022, CMS named 11 claims across 1 drug.
Dr. Atta's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 112023: 129%
Drugs named by CMS: 1 in 2023, 1 in 2022.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Massuda Atta takes part in Medicare
Dr. Atta accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Massuda Atta received $21 in industry payments in 2017
CMS Open Payments shows 1 general payment to Dr. Atta from 1 drug or device company in 2017. Food and beverage make up the largest share, 100% of the total. Actelion Pharmaceuticals US, Inc. paid the most, $21.
Companies that paid Dr. Atta the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Massuda Atta'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Massuda Atta
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. Massuda Atta's NPI number?
Dr. Massuda Atta's NPI number is 1528298619. It was assigned on July 23, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Massuda Atta?
Dr. Massuda Atta is an internist in Walnut Creek, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Massuda Atta practice?
Dr. Atta practices at 1425 S Main Street, Walnut Creek, CA 94596. Dr. Atta's primary practice is Walnut Creek Medical Center in Walnut Creek, California, part of Kaiser Permanente.
What is Dr. Massuda Atta's office phone number?
The practice phone on file for Dr. Atta is (925) 295-4000.
What is Dr. Massuda Atta's medical license number?
Dr. Atta holds Massachusetts license 259769, one of the licenses on file in 2 states.
Which states has Dr. Massuda Atta been licensed in?
Dmand AI has state licenses on file for Dr. Atta in Massachusetts and New Jersey.
Which hospitals is Dr. Massuda Atta affiliated with?
Dr. Atta practices at Walnut Creek Medical Center in Walnut Creek, California.
What medical group is Dr. Massuda Atta part of?
Dr. Atta is linked to The Permanente Medical Group, Inc.
Does Dr. Massuda Atta accept Medicare?
Yes. CMS data shows Dr. Atta billed Medicare for 21 services in 2021, and Dr. Atta accepts Medicare assignment.
What services does Dr. Massuda Atta bill to Medicare?
In 2021, Dr. Atta's most billed Medicare services were hospital inpatient care (99232).
Show 3 more questionsShow fewer questions
What drugs does Dr. Massuda Atta prescribe most?
In 2023 Medicare Part D data, Dr. Atta's most prescribed drugs by claims were Atenolol.
Has Dr. Massuda Atta received payments from drug or device companies?
CMS Open Payments shows $21 in general payments to Dr. Atta from 1 company from 2017 to 2017. The largest total came from Actelion Pharmaceuticals US, Inc.
How long has Dr. Massuda Atta been practicing?
Dr. Atta graduated from medical school in 2006, 20 years ago.
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