Gwendolyn Dunevant Coffey, NP
- Medicare services, 2024
- 159
- Medicare patients, 2024
- 56
- Part D claims, 2024
- 222
- MIPS score, 2024
- 89
- Hospital affiliations
- 3
- Practice address
- 300 Pasteur Drive, Stanford, CA 94305
- Practice phone
- Call (650) 723-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Gwendolyn Coffey'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.
Gwendolyn Dunevant Coffey is a nurse practitioner in Stanford, California
Gwendolyn Coffey practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University.
Gwendolyn Coffey's NPI, 1659423705, was assigned on January 17, 2007. Gwendolyn Coffey holds California license 10083.
- NPI
- 1659423705NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7618072034
- NPI enumeration date
- January 17, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (650) 723-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Gwendolyn Dunevant Coffey practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California
Gwendolyn Coffey's primary practice is Stanford Hospital at 300 Pasteur Drive, at 300 Pasteur Drive, Stanford, CA 94305 in Santa Clara County. The practice phone is (650) 723-4000.
- Stanford Hospital at 300 Pasteur Drive300 Pasteur Drive, Stanford, CA 94305 · Santa Clara CountyPhone(650) 723-4000
Source: Dmand AI Affiliation Data
Gwendolyn Dunevant Coffey is affiliated with 3 sites of care and 1 medical group
Gwendolyn Coffey's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Gwendolyn Coffey is also affiliated with Stanford Health Care Tri-Valley. The medical group on file is Stanford Health Care. Dmand AI also links Gwendolyn Coffey to 1 more hospital, named with a free account. Gwendolyn Coffey'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 Gwendolyn Dunevant Coffey's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Gwendolyn Coffey practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Stanford Hospital at 300 Pasteur Drive | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Gwendolyn Dunevant Coffey is one of 5,983 nurse practitioners in California
Nurse practitioner is Gwendolyn Coffey's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Gwendolyn Coffey is licensed in California.
Specialties and state licenses
- Nurse practitioner, CaliforniaPrimary
Clinical focus
Dmand AI lists epilepsy and itchy rashes among the conditions Gwendolyn Coffey treats.
Nurse practitioners near Gwendolyn Coffey
Counts of nurse practitioners 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
Gwendolyn Dunevant Coffey billed Medicare for 159 services in 2024
CMS data shows 159 Medicare services from Gwendolyn Coffey across 3 procedure codes in 2024, for 56 Medicare patients. Medicare paid $16,338 for them.
Gwendolyn Coffey's Medicare services by type, 2024
- Office and hospital visits130
- Other services29
Where Gwendolyn Coffey's Medicare services took place, 2024
- In an office13384%
- In a facility2616%
Gwendolyn Coffey compared with the California median for nurse practitioners, 2024
- Gwendolyn Coffey
- California median
- Medicare services
- 159vs 27943% below
- Medicare patients
- 56vs 9239% below
- Part D claims
- 138vs 36662% below
Medians across 3,047 nurse practitioners in California with Dmand AI profiles that report each measure.
Gwendolyn Coffey'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
Gwendolyn Dunevant Coffey treated 56 Medicare patients in 2024, average age 67
CMS counts 56 Medicare patients who saw Gwendolyn Coffey in 2024. The largest group is 65 to 74, with 25 patients. 61% of them have high cholesterol, and 59% have high blood pressure. 32% are also on Medicaid. Their average risk score is 1.91, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Gwendolyn Coffey's median patient age at 54, with 48% women.
Gwendolyn Coffey's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Gwendolyn Coffey's Medicare patients by sex, 2024
- Women3359%
- Men2341%
Chronic conditions among Gwendolyn Coffey's Medicare patients, 2024
- High cholesterol61%
- High blood pressure59%
- Anxiety41%
- Stroke or TIA39%
- Cancer38%
- Mood disorders34%
- Arthritis30%
- Depression30%
Share of Medicare patients with each condition. A patient can have several.
Gwendolyn Coffey's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women48%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Gwendolyn Dunevant Coffey wrote 222 Medicare Part D claims in 2024
In 2024, Gwendolyn Coffey wrote 222 Medicare Part D claims for 51 patients. 71% of them were for generic drugs. CMS names the drug for 138 of them, across 8 drugs with 11 or more claims each, at $663,976 in total drug cost.
Gwendolyn Coffey's Part D claims by kind of drug, 2024
- Generic158 claims71%
- Brand-name64 claims29%
Gwendolyn Coffey'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.
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
Gwendolyn Dunevant Coffey scored 89 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Gwendolyn Coffey for performance year 2024, reported as part of a group. Gwendolyn Coffey accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Gwendolyn Coffey as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Gwendolyn Coffey's MIPS scores, performance year 2024
- 89of 100Final score
- 87.1of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 70of 100Cost
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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Gwendolyn Dunevant Coffey received $21 in industry payments in 2024
CMS Open Payments shows 1 general payment to Gwendolyn Coffey from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $21.
Companies that paid Gwendolyn Coffey the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Gwendolyn Dunevant Coffey'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) |
| 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 Gwendolyn Dunevant Coffey
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Gwendolyn Dunevant Coffey's NPI number?
Gwendolyn Dunevant Coffey's NPI number is 1659423705. It was assigned on January 17, 2007, and it is active in the NPI Registry.
What does Gwendolyn Dunevant Coffey specialize in?
Gwendolyn Dunevant Coffey is a nurse practitioner in Stanford, California. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Gwendolyn Dunevant Coffey practice?
Gwendolyn Coffey practices at 300 Pasteur Drive, Stanford, CA 94305. Gwendolyn Coffey's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Dmand AI also links Gwendolyn Coffey to 1 hospital.
What is Gwendolyn Dunevant Coffey's office phone number?
The practice phone on file for Gwendolyn Coffey is (650) 723-4000.
What is Gwendolyn Dunevant Coffey's medical license number?
Gwendolyn Coffey holds California license 10083.
Which hospitals is Gwendolyn Dunevant Coffey affiliated with?
Gwendolyn Coffey practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California. Gwendolyn Coffey is also affiliated with Stanford Health Care Tri-Valley. Dmand AI links Gwendolyn Coffey to 1 more hospital.
What medical group is Gwendolyn Dunevant Coffey part of?
Gwendolyn Coffey is linked to Stanford Health Care.
Does Gwendolyn Dunevant Coffey accept Medicare?
Yes. CMS data shows Gwendolyn Coffey billed Medicare for 159 services in 2024, and Gwendolyn Coffey accepts Medicare assignment.
Does Gwendolyn Dunevant Coffey offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Gwendolyn Coffey as offering telehealth services.
What is Gwendolyn Dunevant Coffey's MIPS score?
Gwendolyn Coffey's MIPS final score for performance year 2024 is 89 out of 100, reported as part of a group.
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How many Medicare patients does Gwendolyn Dunevant Coffey see?
CMS counts 56 Medicare patients who saw Gwendolyn Coffey in 2024, with an average age of 67.
What services does Gwendolyn Dunevant Coffey bill to Medicare?
In 2024, Gwendolyn Coffey's most billed Medicare services were office visit, established patient (99215), office visit, established patient (99214) and medicare service (G2211).
What drugs does Gwendolyn Dunevant Coffey prescribe most?
In 2024 Medicare Part D data, Gwendolyn Coffey's most prescribed drugs by claims were Welireg, Duloxetine HCl and Ondansetron HCl.
Has Gwendolyn Dunevant Coffey received payments from drug or device companies?
CMS Open Payments shows $21 in general payments to Gwendolyn Coffey from 1 company from 2024 to 2024. The largest total came from Merck Sharp & Dohme Corporation.
How long has Gwendolyn Dunevant Coffey been practicing?
Gwendolyn Coffey graduated from medical school in 1998, 28 years ago.
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