Nathaniel Parker
- Medicare services, 2024
- 273
- Medicare patients, 2024
- 109
- Part D claims, 2024
- 158
- MIPS score, 2024
- 100
- Hospital affiliations
- 1
- Practice address
- 20 York Street, New Haven, CT 06510
- Practice phone
- Call (203) 688-5900
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Yale New Haven Psychiatric Hospital (York St)
Psychiatric Inpatient Facility · New Haven, Connecticut
Find Nathaniel Parker's professional email, personal email and mobile number
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Nathaniel Parker is an internist in New Haven, Connecticut
Nathaniel Parker practices at Yale New Haven Psychiatric Hospital (York St) in New Haven, Connecticut.
Nathaniel Parker's NPI, 1124511753, was assigned on June 8, 2018. Nathaniel Parker graduated from Kansas City University of Med & Biosciences, College of Osteo Med in 2018. Nathaniel Parker holds Kentucky license 94-09474.
- NPI
- 1124511753NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6800145210
- NPI enumeration date
- June 8, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 688-5900
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Nathaniel Parker practices at Yale New Haven Psychiatric Hospital (York St) in New Haven, Connecticut
Nathaniel Parker's primary practice is Yale New Haven Psychiatric Hospital (York St), at 20 York Street, New Haven, CT 06510. The practice phone is (203) 688-5900.
- Yale New Haven Psychiatric Hospital (York St)20 York Street, New Haven, CT 06510Phone(203) 688-5900
Source: Dmand AI Affiliation Data
Nathaniel Parker is affiliated with 2 sites of care and 1 medical group
Nathaniel Parker's primary practice is Yale New Haven Psychiatric Hospital (York St) in New Haven, Connecticut. Nathaniel Parker is also affiliated with Yale New Haven Hospital. The medical group on file is Northeast Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Nathaniel Parker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Nathaniel Parker practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Yale New Haven Psychiatric Hospital (York St) | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Nathaniel Parker is one of 2,189 internists in Connecticut
Internal medicine is Nathaniel Parker's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Nathaniel Parker is licensed in Kentucky.
Specialties and state licenses
- Internal medicine, KentuckyPrimary
Internists near Nathaniel Parker
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
Nathaniel Parker billed Medicare for 273 services in 2024
CMS data shows 273 Medicare services from Nathaniel Parker across 4 procedure codes in 2024, for 109 Medicare patients. Medicare paid $27,254 for them. Every service was in a facility, such as a hospital, rather than an office.
Nathaniel Parker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3382024: 27319%
Nathaniel Parker compared with the Connecticut median for internists, 2024
- Nathaniel Parker
- Connecticut median
- Medicare services
- 273vs 39030% below
- Medicare patients
- 109vs 17237% below
- Part D claims
- 31vs 34391% below
Medians across 2,185 internists in Connecticut with Dmand AI profiles that report each measure.
Nathaniel Parker'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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Nathaniel Parker treated 109 Medicare patients in 2024, average age 73
CMS counts 109 Medicare patients who saw Nathaniel Parker in 2024. The largest group is 65 to 74, with 50 patients. 75% of them have high blood pressure, and 72% have high cholesterol. 28% are also on Medicaid. Their average risk score is 3.27, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Nathaniel Parker's median patient age at 69, with 45% women.
Nathaniel Parker's Medicare patients by age, 2024
Nathaniel Parker's Medicare patients by sex, 2024
- Women5046%
- Men5954%
Chronic conditions among Nathaniel Parker's Medicare patients, 2024
- High blood pressure75%
- High cholesterol72%
- Cancer61%
- Arthritis60%
- Anxiety53%
- Mood disorders53%
- Depression49%
- COPD44%
Share of Medicare patients with each condition. A patient can have several.
Nathaniel Parker's 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
- Women45%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Nathaniel Parker wrote 158 Medicare Part D claims in 2024
In 2024, Nathaniel Parker wrote 158 Medicare Part D claims for 68 patients. 81% of them were for generic drugs. CMS names the drug for 31 of them, across 2 drugs with 11 or more claims each, at $390 in total drug cost. In 2021, CMS named 118 claims across 8 drugs.
Nathaniel Parker's Part D claims by kind of drug, 2024
- Generic128 claims81%
- Brand-name and other30 claims19%
Nathaniel Parker'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 Nathaniel Parker's Part D claims, 2024
- Opioids27%43 of 158 claims
- Antibiotics20%31 of 158 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, 2021 to 2024
- 2021
- 2024
- Claims for drugs CMS names
- 2021: 1182024: 3174%
Drugs named by CMS: 2 in 2024, 8 in 2021.
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
Nathaniel Parker scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Nathaniel Parker for performance year 2024, reported through an alternative payment model (APM). Nathaniel Parker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Nathaniel Parker's MIPS scores, performance year 2024
- 100of 100Final score
- 86.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
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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Nathaniel Parker received $367 in industry payments from 2019 to 2021
CMS Open Payments shows 3 general payments to Nathaniel Parker from 3 drug and device companies from 2019 to 2021. Food and beverage make up the largest share, 100% of the total. Epizyme, Inc., paid the most, $125.
General payments to Nathaniel Parker by program year, 2019 to 2021
Companies that paid Nathaniel Parker the most, 2019 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Nathaniel Parker graduated from Kansas City University of Med & Biosciences, College of Osteo Med
Nathaniel Parker graduated from Kansas City University of Med & Biosciences, College of Osteo Med in 2018.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Nathaniel Parker'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)Clinician Public Reporting: Overall MIPS Performance (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 Nathaniel Parker
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Nathaniel Parker's NPI number?
Nathaniel Parker's NPI number is 1124511753. It was assigned on June 8, 2018, and it is active in the NPI Registry.
What does Nathaniel Parker specialize in?
Nathaniel Parker is an internist in New Haven, Connecticut. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Nathaniel Parker practice?
Nathaniel Parker practices at 20 York Street, New Haven, CT 06510. Nathaniel Parker's primary practice is Yale New Haven Psychiatric Hospital (York St) in New Haven, Connecticut.
What is Nathaniel Parker's office phone number?
The practice phone on file for Nathaniel Parker is (203) 688-5900.
What is Nathaniel Parker's medical license number?
Nathaniel Parker holds Kentucky license 94-09474.
Which hospitals is Nathaniel Parker affiliated with?
Nathaniel Parker is affiliated with Yale New Haven Hospital.
What medical group is Nathaniel Parker part of?
Nathaniel Parker is linked to Northeast Medical Group.
Does Nathaniel Parker accept Medicare?
Yes. CMS data shows Nathaniel Parker billed Medicare for 273 services in 2024, and Nathaniel Parker accepts Medicare assignment.
What is Nathaniel Parker's MIPS score?
Nathaniel Parker's MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Nathaniel Parker see?
CMS counts 109 Medicare patients who saw Nathaniel Parker in 2024, with an average age of 73.
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What services does Nathaniel Parker bill to Medicare?
In 2024, Nathaniel Parker's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99239) and hospital inpatient care (99223).
Where did Nathaniel Parker go to medical school?
Nathaniel Parker graduated from Kansas City University of Med & Biosciences, College of Osteo Med in 2018.
What drugs does Nathaniel Parker prescribe most?
In 2024 Medicare Part D data, Nathaniel Parker's most prescribed drugs by claims were Oxycodone HCl and Morphine Sulfate.
Has Nathaniel Parker received payments from drug or device companies?
CMS Open Payments shows $367 in general payments to Nathaniel Parker from 3 companies from 2019 to 2021. The largest total came from Epizyme, Inc.,.
How long has Nathaniel Parker been practicing?
Nathaniel Parker graduated from medical school in 2018, 8 years ago.
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