Dr. Persis Oneeka Williams, MD
- Medicare services, 2024
- 706
- Medicare patients, 2024
- 381
- Part D claims, 2024
- 851
- Hospital affiliations
- 1
- Industry payments
- $1,861
- Practice address
- 133 Old Road To 9 Acre Corner, West Concord, MA 01742
- Practice phone
- Call (978) 369-1400
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Williams' professional email, personal email and mobile number
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Dr. Persis Oneeka Williams is a urologist in Concord, Massachusetts
Dr. Williams practices at Emerson Hospital in West Concord, Massachusetts, part of Emerson Health System.
Dr. Williams' NPI, 1396742359, was assigned on July 6, 2005. Dr. Williams graduated from Harvard Medical School in 1993. Dr. Williams holds Massachusetts license 81022.
- NPI
- 1396742359NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1850485897
- NPI enumeration date
- July 6, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (978) 369-1400
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Persis Oneeka Williams practices at Emerson Hospital in West Concord, Massachusetts
Dr. Williams' primary practice is Emerson Hospital, at 133 Old Road To 9 Acre Corner, West Concord, MA 01742 in Middlesex County. The practice phone is (978) 369-1400.
- Emerson Hospital133 Old Road To 9 Acre Corner, West Concord, MA 01742 · Middlesex CountyPhone(978) 369-1400
Source: Dmand AI Affiliation Data
Dr. Persis Oneeka Williams is affiliated with 3 sites of care and 2 medical groups
Dr. Williams' primary practice is Emerson Hospital in West Concord, Massachusetts, part of Emerson Health System. The medical group on file is Emerson Health. Dmand AI also links Dr. Williams to 1 more group practice or clinic, 1 therapy and rehab clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Persis Oneeka Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williams practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Emerson Hospital | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Emerson Health System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Persis Oneeka Williams is one of 315 urologists in Massachusetts
Urology is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 208800000X. Dr. Williams is licensed in Massachusetts.
Specialties and state licenses
- Urology, MassachusettsPrimary
Urologists near Dr. Williams
Counts of urologists 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. Persis Oneeka Williams billed Medicare for 706 services in 2024
CMS data shows 706 Medicare services from Dr. Williams across 9 procedure codes in 2024, for 381 Medicare patients. Medicare paid $43,578 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Williams' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5812024: 5545%
- Surgery
- 2023: 1412024: 1528%
Dr. Williams compared with the Massachusetts median for urologists, 2024
- Dr. Williams
- Massachusetts median
- Medicare services
- 706vs 1,15239% below
- Medicare patients
- 381vs 50925% below
- Part D claims
- 748vs 57630% above
Medians across 305 urologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Williams' 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. Williams?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Williams and other urologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Persis Oneeka Williams treated 381 Medicare patients in 2024, average age 78
CMS counts 381 Medicare patients who saw Dr. Williams in 2024. The largest group is 75 to 84, with 167 patients. 73% of them have high cholesterol, and 72% have high blood pressure. 10% are also on Medicaid. Their average risk score is 1.18, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 69, with 80% women.
Dr. Williams' Medicare patients by age, 2024
Dr. Williams' Medicare patients by sex, 2024
- Women31182%
- Men7018%
Chronic conditions among Dr. Williams' Medicare patients, 2024
- High cholesterol73%
- High blood pressure72%
- Arthritis50%
- Anxiety31%
- Mood disorders29%
- Depression27%
- Osteoporosis27%
- Chronic kidney disease25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Williams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women80%
- Men19%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Persis Oneeka Williams wrote 851 Medicare Part D claims in 2024
In 2024, Dr. Williams wrote 851 Medicare Part D claims for 289 patients. 68% of them were for generic drugs. CMS names the drug for 748 of them, across 13 drugs with 11 or more claims each, at $168,443 in total drug cost. In 2023, CMS named 706 claims across 17 drugs.
Dr. Williams' Part D claims by kind of drug, 2024
- Generic579 claims68%
- Brand-name272 claims32%
Dr. Williams' 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. Williams' Part D claims, 2024
- Antibiotics17%141 of 851 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: 7062024: 7486%
Drugs named by CMS: 13 in 2024, 17 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
How Dr. Persis Oneeka Williams takes part in Medicare
Dr. Williams accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Persis Oneeka Williams received $1,861 in industry payments from 2016 to 2025
CMS Open Payments shows 87 general payments to Dr. Williams from 27 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 76% of the total. Astellas Pharma US Inc paid the most, $887.
General payments to Dr. Williams by program year, 2016 to 2025
General payments to Dr. Williams by kind, 2016 to 2025
- Food and beverage$1,41676%
- Education$44524%
Companies that paid Dr. Williams 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. Persis Oneeka Williams graduated from Harvard Medical School
Dr. Williams graduated from Harvard Medical School in 1993.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Persis Oneeka Williams'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 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Persis Oneeka Williams
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. Persis Oneeka Williams' NPI number?
Dr. Persis Oneeka Williams' NPI number is 1396742359. It was assigned on July 6, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Persis Oneeka Williams?
Dr. Persis Oneeka Williams is a urologist in Concord, Massachusetts. The primary specialty in the NPI Registry is Urology Physician (taxonomy code 208800000X).
Where does Dr. Persis Oneeka Williams practice?
Dr. Williams practices at 133 Old Road To 9 Acre Corner, West Concord, MA 01742. Dr. Williams' primary practice is Emerson Hospital in West Concord, Massachusetts, part of Emerson Health System. Dmand AI also links Dr. Williams to 1 group practice or clinic, 1 therapy and rehab clinic and 1 medical group.
What is Dr. Persis Oneeka Williams' office phone number?
The practice phone on file for Dr. Williams is (978) 369-1400.
What is Dr. Persis Oneeka Williams' medical license number?
Dr. Williams holds Massachusetts license 81022.
Which hospitals is Dr. Persis Oneeka Williams affiliated with?
Dr. Williams practices at Emerson Hospital in West Concord, Massachusetts.
What medical group is Dr. Persis Oneeka Williams part of?
Dr. Williams is linked to Emerson Health. Dmand AI links Dr. Williams to 1 more medical group.
Does Dr. Persis Oneeka Williams accept Medicare?
Yes. CMS data shows Dr. Williams billed Medicare for 706 services in 2024, and Dr. Williams accepts Medicare assignment.
How many Medicare patients does Dr. Persis Oneeka Williams see?
CMS counts 381 Medicare patients who saw Dr. Williams in 2024, with an average age of 78.
What services does Dr. Persis Oneeka Williams bill to Medicare?
In 2024, Dr. Williams' most billed Medicare services were office visit, established patient (99213), office visit, new patient (99204) and surgery: urinary system (52000).
Show 4 more questionsShow fewer questions
Where did Dr. Persis Oneeka Williams go to medical school?
Dr. Williams graduated from Harvard Medical School in 1993.
What drugs does Dr. Persis Oneeka Williams prescribe most?
In 2024 Medicare Part D data, Dr. Williams' most prescribed drugs by claims were Gemtesa, Methenamine Hippurate and Estradiol.
Has Dr. Persis Oneeka Williams received payments from drug or device companies?
CMS Open Payments shows $1,861 in general payments to Dr. Williams from 27 companies from 2016 to 2025. The largest total came from Astellas Pharma US Inc.
How long has Dr. Persis Oneeka Williams been practicing?
Dr. Williams graduated from medical school in 1993, 33 years ago.
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