Dr. Gregory Lance Phelps Jr., MD
- Medicare services, 2017
- 991
- Part D claims, 2024
- 2,516
- Industry payments
- $3,723
- Affiliated sites
- 1
- Medical groups
- 2
- Practice address
- 1505 Maryland NE Ave, Washington, DC 20002
- Practice phone
- Call (817) 289-8300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Carelon Medical Partners of Arizona
Washington, District of Columbia
Find Dr. Phelps' professional email, personal email and mobile number
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Dr. Gregory Lance Phelps Jr. is an internist in Washington, District of Columbia
Dr. Phelps practices at Carelon Medical Partners of Arizona in Washington, District of Columbia.
Dr. Phelps' NPI, 1619140209, was assigned on April 4, 2008. Dr. Phelps holds Tennessee license 47483.
- NPI
- 1619140209NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8820268923
- NPI enumeration date
- April 4, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (817) 289-8300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory Lance Phelps Jr. practices at Carelon Medical Partners of Arizona in Washington, District of Columbia
Dr. Phelps' primary practice is Carelon Medical Partners of Arizona, at 1505 Maryland NE Ave, Washington, DC 20002 in District Of Columbia County. The practice phone is (817) 289-8300.
- Carelon Medical Partners of Arizona1505 Maryland NE Ave, Washington, DC 20002 · District Of Columbia CountyPhone(817) 289-8300
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gregory Lance Phelps Jr. is affiliated with 2 sites of care and 2 medical groups
Dr. Phelps' primary practice is Carelon Medical Partners of Arizona in Washington, District of Columbia. The medical group on file is Carelon Health. Dmand AI also links Dr. Phelps to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory Lance Phelps Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Phelps practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Carelon Medical Partners of Arizona | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory Lance Phelps Jr. is one of 660 internists in District of Columbia
Internal medicine is Dr. Phelps' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Phelps is licensed in Tennessee.
Specialties and state licenses
- Internal medicine, TennesseePrimary
Internists near Dr. Phelps
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. Gregory Lance Phelps Jr. billed Medicare for 991 services in 2017
CMS data shows 991 Medicare services from Dr. Phelps across 8 procedure codes in 2017. Medicare paid $66,502 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Phelps' Medicare services by type, 2016 to 2017
- 2016
- 2017
- Office and hospital visits
- 2016: 1,0432017: 9915%
Dr. Phelps compared with the District of Columbia median for internists, 2017
- Dr. Phelps
- District of Columbia median
- Medicare services
- 991vs 3542.8 times
- Part D claims
- 1,966vs 11017.9 times
Medians across 591 internists in District of Columbia with Dmand AI profiles that report each measure.
Dr. Phelps' most billed Medicare procedure codes, 2017
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. Phelps and other internists in District of Columbia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory Lance Phelps Jr.'s patients have a median age of 56
Across all payers, Dmand AI patient panel data puts Dr. Phelps' median patient age at 56, with 41% women.
Dr. Phelps' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women41%
- Men58%
Source: Dmand AI Patient Panel Data
Dr. Gregory Lance Phelps Jr. wrote 2,516 Medicare Part D claims in 2024
In 2024, Dr. Phelps wrote 2,516 Medicare Part D claims for 149 patients. 82% of them were for generic drugs. CMS names the drug for 1,966 of them, across 54 drugs with 11 or more claims each, at $248,410 in total drug cost. In 2023, CMS named 2,126 claims across 60 drugs.
Dr. Phelps' Part D claims by kind of drug, 2024
- Generic2,053 claims82%
- Brand-name432 claims17%
- Other31 claims1%
Dr. Phelps' 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. Phelps' Part D claims, 2024
- Opioids2%38 of 2,516 claims
- Antibiotics2%57 of 2,516 claims
- Antipsychotics, patients 65 and over1%18 of 2,516 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: 2,1262024: 1,9668%
Drugs named by CMS: 54 in 2024, 60 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. Gregory Lance Phelps Jr. takes part in Medicare
Dr. Phelps 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. Gregory Lance Phelps Jr. received $3,723 in industry payments from 2021 to 2025
CMS Open Payments shows 15 general payments to Dr. Phelps from 5 drug and device companies from 2021 to 2025. Speaker and faculty fees make up the largest share, 92% of the total. Pfizer Inc. paid the most, $3,477.
General payments to Dr. Phelps by program year, 2021 to 2025
General payments to Dr. Phelps by kind, 2021 to 2025
- Speaker and faculty fees$3,41092%
- Food and beverage$2477%
- Travel and lodging$672%
Companies that paid Dr. Phelps the most, 2021 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Gregory Lance Phelps Jr.'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 Data |
| 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) |
| 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. Gregory Lance Phelps Jr.
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. Gregory Lance Phelps Jr.'s NPI number?
Dr. Gregory Lance Phelps Jr.'s NPI number is 1619140209. It was assigned on April 4, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory Lance Phelps Jr.?
Dr. Gregory Lance Phelps Jr. is an internist in Washington, District of Columbia. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gregory Lance Phelps Jr. practice?
Dr. Phelps practices at 1505 Maryland NE Ave, Washington, DC 20002. Dr. Phelps' primary practice is Carelon Medical Partners of Arizona in Washington, District of Columbia. Dmand AI also links Dr. Phelps to 1 group practice or clinic and 1 medical group.
What is Dr. Gregory Lance Phelps Jr.'s office phone number?
The practice phone on file for Dr. Phelps is (817) 289-8300.
What is Dr. Gregory Lance Phelps Jr.'s medical license number?
Dr. Phelps holds Tennessee license 47483.
What medical group is Dr. Gregory Lance Phelps Jr. part of?
Dr. Phelps is linked to Carelon Health. Dmand AI links Dr. Phelps to 1 more medical group.
Does Dr. Gregory Lance Phelps Jr. accept Medicare?
Yes. CMS data shows Dr. Phelps billed Medicare for 991 services in 2017, and Dr. Phelps accepts Medicare assignment.
What services does Dr. Gregory Lance Phelps Jr. bill to Medicare?
In 2017, Dr. Phelps' most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and hospital inpatient care (99238).
What drugs does Dr. Gregory Lance Phelps Jr. prescribe most?
In 2024 Medicare Part D data, Dr. Phelps' most prescribed drugs by claims were Amlodipine Besylate, Atorvastatin Calcium and Pantoprazole Sodium.
Has Dr. Gregory Lance Phelps Jr. received payments from drug or device companies?
CMS Open Payments shows $3,723 in general payments to Dr. Phelps from 5 companies from 2021 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Gregory Lance Phelps Jr. been practicing?
Dr. Phelps' NPI was assigned in 2008.
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