Dr. Harold Gregory Ota, MD
- Medicare services, 2024
- 745
- Medicare patients, 2024
- 445
- Part D claims, 2024
- 265
- Hospital affiliations
- 3
- Industry payments
- $46
- Practice address
- 55 Fruit Street, Boston, MA 02114
- Practice phone
- Call (617) 726-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Ota'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. Harold Gregory Ota is an otolaryngologist in Boston, Massachusetts
Dr. Ota practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Ota's NPI, 1598839821, was assigned on November 20, 2006. Dr. Ota graduated from University of Massachusetts Medical School in 1981. Dr. Ota holds Massachusetts license 54244.
- NPI
- 1598839821NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8527014984
- NPI enumeration date
- November 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 726-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Harold Gregory Ota practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Ota's primary practice is Massachusetts General Hospital, at 55 Fruit Street, Boston, MA 02114 in Suffolk County. The practice phone is (617) 726-2000.
- Massachusetts General Hospital55 Fruit Street, Boston, MA 02114 · Suffolk CountyPhone(617) 726-2000
Source: Dmand AI Affiliation Data
Dr. Harold Gregory Ota is affiliated with 7 sites of care and 4 medical groups
Dr. Ota's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Ota is also affiliated with Massachusetts Eye and Ear. The medical group on file is Massachusetts General Physicians Organization (MGPO). Dmand AI also links Dr. Ota to 1 more hospital, 3 group practices and clinics, 3 medical groups and 1 community health center, 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. Harold Gregory Ota's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ota practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Massachusetts General Hospital | Available with a free account |
| +6 more sites and 3 medical groups | 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 Mass General Brigham and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Harold Gregory Ota is one of 308 otolaryngologists in Massachusetts
Otolaryngology is Dr. Ota's primary specialty in the NPI Registry, under taxonomy code 207Y00000X. Dr. Ota is licensed in Massachusetts.
Specialties and state licenses
- Otolaryngology, MassachusettsPrimary
Otolaryngologists near Dr. Ota
Counts of otolaryngologists 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. Harold Gregory Ota billed Medicare for 745 services in 2024
CMS data shows 745 Medicare services from Dr. Ota across 8 procedure codes in 2024, for 445 Medicare patients. Medicare paid $50,607 for them. Every service was in an office.
Dr. Ota's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4262024: 4045%
- Surgery
- 2023: 3132024: 3213%
- Tests and treatments
- 2023: 02024: 20
Dr. Ota compared with the Massachusetts median for otolaryngologists, 2024
- Dr. Ota
- Massachusetts median
- Medicare services
- 745vs 744Close to median
- Medicare patients
- 445vs 36323% above
- Part D claims
- 184vs 892.1 times
Medians across 303 otolaryngologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Ota'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. Ota?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ota and other otolaryngologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Harold Gregory Ota treated 445 Medicare patients in 2024, average age 77
CMS counts 445 Medicare patients who saw Dr. Ota in 2024. The largest group is 75 to 84, with 187 patients. 73% of them have high blood pressure, and 72% have high cholesterol. 19% are also on Medicaid. Their average risk score is 1.17, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Ota's median patient age at 65, with 55% women.
Dr. Ota's Medicare patients by age, 2024
Dr. Ota's Medicare patients by sex, 2024
- Women26560%
- Men18040%
Chronic conditions among Dr. Ota's Medicare patients, 2024
- High blood pressure73%
- High cholesterol72%
- Arthritis49%
- Anxiety32%
- Chronic kidney disease30%
- Mood disorders29%
- Ischemic heart disease28%
- Depression25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ota's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Harold Gregory Ota wrote 265 Medicare Part D claims in 2024
In 2024, Dr. Ota wrote 265 Medicare Part D claims for 126 patients. 98% of them were for generic drugs. CMS names the drug for 184 of them, across 7 drugs with 11 or more claims each, at $6,777 in total drug cost. In 2023, CMS named 162 claims across 5 drugs.
Dr. Ota's Part D claims by kind of drug, 2024
- Generic260 claims98%
- Brand-name and other5 claims2%
Dr. Ota'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. Ota's Part D claims, 2024
- Antibiotics10%27 of 265 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: 1622024: 18414%
Drugs named by CMS: 7 in 2024, 5 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. Harold Gregory Ota takes part in Medicare
Dr. Ota 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)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Harold Gregory Ota received $46 in industry payments from 2020 to 2022
CMS Open Payments shows 2 general payments to Dr. Ota from 1 drug or device company from 2020 to 2022. Food and beverage make up the largest share, 100% of the total. GlaxoSmithKline, LLC. paid the most, $46.
General payments to Dr. Ota by program year, 2020 to 2022
Companies that paid Dr. Ota the most, 2020 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Harold Gregory Ota graduated from University of Massachusetts Medical School
Dr. Ota graduated from University of Massachusetts Medical School in 1981.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Harold Gregory Ota'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) |
| 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. Harold Gregory Ota
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. Harold Gregory Ota's NPI number?
Dr. Harold Gregory Ota's NPI number is 1598839821. It was assigned on November 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Harold Gregory Ota?
Dr. Harold Gregory Ota is an otolaryngologist in Boston, Massachusetts. The primary specialty in the NPI Registry is Otolaryngology Physician (taxonomy code 207Y00000X).
Where does Dr. Harold Gregory Ota practice?
Dr. Ota practices at 55 Fruit Street, Boston, MA 02114. Dr. Ota's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Ota to 1 hospital, 3 group practices and clinics, 3 medical groups and 1 community health center.
What is Dr. Harold Gregory Ota's office phone number?
The practice phone on file for Dr. Ota is (617) 726-2000.
What is Dr. Harold Gregory Ota's medical license number?
Dr. Ota holds Massachusetts license 54244.
Which hospitals is Dr. Harold Gregory Ota affiliated with?
Dr. Ota practices at Massachusetts General Hospital in Boston, Massachusetts. Dr. Ota is also affiliated with Massachusetts Eye and Ear. Dmand AI links Dr. Ota to 1 more hospital.
What medical group is Dr. Harold Gregory Ota part of?
Dr. Ota is linked to Massachusetts General Physicians Organization (MGPO). Dmand AI links Dr. Ota to 3 more medical groups.
Does Dr. Harold Gregory Ota accept Medicare?
Yes. CMS data shows Dr. Ota billed Medicare for 745 services in 2024, and Dr. Ota accepts Medicare assignment.
How many Medicare patients does Dr. Harold Gregory Ota see?
CMS counts 445 Medicare patients who saw Dr. Ota in 2024, with an average age of 77.
What services does Dr. Harold Gregory Ota bill to Medicare?
In 2024, Dr. Ota's most billed Medicare services were surgery: ear (69210), office visit, established patient (99213) and office visit, new patient (99203).
Show 4 more questionsShow fewer questions
Where did Dr. Harold Gregory Ota go to medical school?
Dr. Ota graduated from University of Massachusetts Medical School in 1981.
What drugs does Dr. Harold Gregory Ota prescribe most?
In 2024 Medicare Part D data, Dr. Ota's most prescribed drugs by claims were Ofloxacin, Fluticasone Propionate and Ipratropium Bromide.
Has Dr. Harold Gregory Ota received payments from drug or device companies?
CMS Open Payments shows $46 in general payments to Dr. Ota from 1 company from 2020 to 2022. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. Harold Gregory Ota been practicing?
Dr. Ota graduated from medical school in 1981, 45 years ago.
Selling to otolaryngology practices?
See otolaryngologists in Massachusetts by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card