Dr. Dwynn N. Greenfield, DO
- Medicare services, 2023
- 12
- Medicare patients, 2024
- 16
- Part D claims, 2024
- 10,085
- Hospital affiliations
- 3
- Industry payments
- $54
- Practice address
- 233 Doctors Street, Sparta, NC 28675
- Practice phone
- Call (336) 372-5511
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Greenfield'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. Dwynn N. Greenfield is a general practice physician in Sparta, North Carolina
Dr. Greenfield practices at Alleghany Health in Sparta, North Carolina, part of Advocate Health.
Dr. Greenfield's NPI, 1588716914, was assigned on January 17, 2007. Dr. Greenfield graduated from Ohio University, College of Osteopathic Medicine in 1985. Dr. Greenfield holds North Carolina license 201200080.
- NPI
- 1588716914NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7416906656
- NPI enumeration date
- January 17, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (336) 372-5511
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Dwynn N. Greenfield practices at Alleghany Health in Sparta, North Carolina
Dr. Greenfield's primary practice is Alleghany Health, at 233 Doctors Street, Sparta, NC 28675 in Alleghany County. The practice phone is (336) 372-5511.
- Alleghany Health233 Doctors Street, Sparta, NC 28675 · Alleghany CountyPhone(336) 372-5511
Source: Dmand AI Affiliation Data
Dr. Dwynn N. Greenfield is affiliated with 5 sites of care and 2 medical groups
Dr. Greenfield's primary practice is Alleghany Health in Sparta, North Carolina, part of Advocate Health. Dr. Greenfield is also affiliated with Twin County Regional Healthcare. The medical group on file is Twin County Obstetrics & Gynecology. Dmand AI also links Dr. Greenfield to 1 more hospital, 2 home health agencies and 1 medical group, each named with a free account. Dr. Greenfield's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Dwynn N. Greenfield's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Greenfield practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Alleghany Health | Available with a free account |
| +4 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 Advocate Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Dwynn N. Greenfield is one of 196 general practice physicians in North Carolina
General practice is Dr. Greenfield's primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dr. Greenfield is licensed in North Carolina.
Specialties and state licenses
- General practice, North CarolinaPrimary
General practice physicians near Dr. Greenfield
Counts of general practice physicians 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. Dwynn N. Greenfield billed Medicare for 12 services in 2023
CMS data shows 12 Medicare services from Dr. Greenfield across 1 procedure code in 2023, for 16 Medicare patients. Medicare paid $119 for them. Every service was in an office.
Dr. Greenfield's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Tests and treatments
- 2022: 352023: 1266%
- Lab and pathology
- 2022: 262023: 0100%
- Other services
- 2022: 422023: 0100%
- Surgery
- 2022: 1042023: 0100%
- Office and hospital visits
- 2022: 2452023: 0100%
Dr. Greenfield compared with the North Carolina median for general practice physicians, 2023
- Dr. Greenfield
- North Carolina median
- Medicare services
- 12vs 15492% below
- Medicare patients
- 16vs 9082% below
- Part D claims
- 9,200vs 11381.4 times
Medians across 116 general practice physicians in North Carolina with Dmand AI profiles that report each measure.
Dr. Greenfield's most billed Medicare procedure codes, 2023
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. Greenfield?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Greenfield and other general practice physicians in North Carolina.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Dwynn N. Greenfield treated 16 Medicare patients in 2024, average age 75
CMS counts 16 Medicare patients who saw Dr. Greenfield in 2024. 75% of them have high blood pressure. Their average risk score is 1.06, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Greenfield's median patient age at 73, with 46% women.
Chronic conditions among Dr. Greenfield's Medicare patients, 2024
- High blood pressure75%
Share of Medicare patients with each condition. A patient can have several.
Dr. Greenfield's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women46%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Dwynn N. Greenfield wrote 10,085 Medicare Part D claims in 2024
In 2024, Dr. Greenfield wrote 10,085 Medicare Part D claims for 622 patients. 87% of them were for generic drugs. CMS names the drug for 9,200 of them, across 159 drugs with 11 or more claims each, at $620,532 in total drug cost. In 2023, CMS named 6,026 claims across 132 drugs.
Dr. Greenfield's Part D claims by kind of drug, 2024
- Generic8,792 claims87%
- Brand-name1,239 claims12%
- Other54 claims1%
Dr. Greenfield'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. Greenfield's Part D claims, 2024
- Opioids4%418 of 10,085 claims
- Antibiotics4%361 of 10,085 claims
- Antipsychotics, patients 65 and over0%36 of 10,085 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: 6,0262024: 9,20053%
Drugs named by CMS: 159 in 2024, 132 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. Dwynn N. Greenfield takes part in Medicare
Dr. Greenfield 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. Dwynn N. Greenfield received $54 in industry payments from 2020 to 2024
CMS Open Payments shows 3 general payments to Dr. Greenfield from 3 drug and device companies from 2020 to 2024. Food and beverage make up the largest share, 100% of the total. iRhythm Technologies, Inc. paid the most, $19.
General payments to Dr. Greenfield by program year, 2020 to 2024
Companies that paid Dr. Greenfield the most, 2020 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Dwynn N. Greenfield graduated from Ohio University, College of Osteopathic Medicine
Dr. Greenfield graduated from Ohio University, College of Osteopathic Medicine in 1985.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Dwynn N. Greenfield'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. Dwynn N. Greenfield
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. Dwynn N. Greenfield's NPI number?
Dr. Dwynn N. Greenfield's NPI number is 1588716914. It was assigned on January 17, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Dwynn N. Greenfield?
Dr. Dwynn N. Greenfield is a general practice physician in Sparta, North Carolina. The primary specialty in the NPI Registry is General Practice Physician (taxonomy code 208D00000X).
Where does Dr. Dwynn N. Greenfield practice?
Dr. Greenfield practices at 233 Doctors Street, Sparta, NC 28675. Dr. Greenfield's primary practice is Alleghany Health in Sparta, North Carolina, part of Advocate Health. Dmand AI also links Dr. Greenfield to 1 hospital, 2 home health agencies and 1 medical group.
What is Dr. Dwynn N. Greenfield's office phone number?
The practice phone on file for Dr. Greenfield is (336) 372-5511.
What is Dr. Dwynn N. Greenfield's medical license number?
Dr. Greenfield holds North Carolina license 201200080.
Which hospitals is Dr. Dwynn N. Greenfield affiliated with?
Dr. Greenfield practices at Alleghany Health in Sparta, North Carolina. Dr. Greenfield is also affiliated with Twin County Regional Healthcare. Dmand AI links Dr. Greenfield to 1 more hospital.
What medical group is Dr. Dwynn N. Greenfield part of?
Dr. Greenfield is linked to Twin County Obstetrics & Gynecology. Dmand AI links Dr. Greenfield to 1 more medical group.
Does Dr. Dwynn N. Greenfield accept Medicare?
Yes. CMS data shows Dr. Greenfield billed Medicare for 12 services in 2023, and Dr. Greenfield accepts Medicare assignment.
How many Medicare patients does Dr. Dwynn N. Greenfield see?
CMS counts 16 Medicare patients who saw Dr. Greenfield in 2024, with an average age of 75.
What services does Dr. Dwynn N. Greenfield bill to Medicare?
In 2023, Dr. Greenfield's most billed Medicare services were heart test or procedure (93000).
Show 4 more questionsShow fewer questions
Where did Dr. Dwynn N. Greenfield go to medical school?
Dr. Greenfield graduated from Ohio University, College of Osteopathic Medicine in 1985.
What drugs does Dr. Dwynn N. Greenfield prescribe most?
In 2024 Medicare Part D data, Dr. Greenfield's most prescribed drugs by claims were Levothyroxine Sodium, Gabapentin and Omeprazole.
Has Dr. Dwynn N. Greenfield received payments from drug or device companies?
CMS Open Payments shows $54 in general payments to Dr. Greenfield from 3 companies from 2020 to 2024. The largest total came from iRhythm Technologies, Inc.
How long has Dr. Dwynn N. Greenfield been practicing?
Dr. Greenfield graduated from medical school in 1985, 41 years ago.
Selling to general practice practices?
See general practice physicians in North Carolina 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