Dr. Gillian Reed Woodruff, MD
- Medicare services, 2024
- 441
- Medicare patients, 2024
- 289
- Part D claims, 2024
- 2,477
- Hospital affiliations
- 2
- Industry payments
- $21
- Practice address
- 1205 E North St, Manteca, CA 95336
- Practice phone
- Call (209) 823-3111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Doctors Hospital of Manteca
Manteca, California
Find Dr. Woodruff'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. Gillian Reed Woodruff is an internist in Manteca, California
Dr. Woodruff practices at Doctors Hospital of Manteca in Manteca, California.
Dr. Woodruff's NPI, 1598394496, was assigned on April 3, 2020. Dr. Woodruff graduated from St. George's University School of Medicine in 2020. Dr. Woodruff's California license number on file is A192204.
- NPI
- 1598394496NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2961852181
- NPI enumeration date
- April 3, 2020
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (209) 823-3111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gillian Reed Woodruff practices at Doctors Hospital of Manteca in Manteca, California
Dr. Woodruff's primary practice is Doctors Hospital of Manteca, at 1205 E North St, Manteca, CA 95336 in San Joaquin County. The practice phone is (209) 823-3111.
- Doctors Hospital of Manteca1205 E North St, Manteca, CA 95336 · San Joaquin CountyPhone(209) 823-3111
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gillian Reed Woodruff is affiliated with 3 sites of care and 5 medical groups
Dr. Woodruff's primary practice is Doctors Hospital of Manteca in Manteca, California. Dr. Woodruff is also affiliated with Hopi Health Care Center. The medical group on file is Hopi Health Care Center. Dmand AI also links Dr. Woodruff to 1 more hospital and 4 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gillian Reed Woodruff's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Woodruff practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Doctors Hospital of Manteca | Available with a free account |
| +2 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gillian Reed Woodruff is one of 16,751 internists in California
Internal medicine is Dr. Woodruff's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Woodruff is board certified in internal medicine by the American Board of Internal Medicine. Dr. Woodruff has a license on file in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Woodruff
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. Gillian Reed Woodruff billed Medicare for 441 services in 2024
CMS data shows 441 Medicare services from Dr. Woodruff across 5 procedure codes in 2024, for 289 Medicare patients. Medicare paid $30,690 for them. Every service was in an office.
Dr. Woodruff's Medicare services by type, 2024
- Office and hospital visits355
- Other services86
Dr. Woodruff compared with the California median for internists, 2024
- Dr. Woodruff
- California median
- Medicare services
- 441vs 36122% above
- Medicare patients
- 289vs 15191% above
- Part D claims
- 1,935vs 4214.6 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Woodruff'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. Woodruff?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Woodruff and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gillian Reed Woodruff treated 289 Medicare patients in 2024, average age 77
CMS counts 289 Medicare patients who saw Dr. Woodruff in 2024. The largest group is 75 to 84, with 127 patients. 75% of them have high cholesterol, and 63% have high blood pressure. 5% are also on Medicaid. Their average risk score is 0.98, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Woodruff's median patient age at 78, with 68% women.
Dr. Woodruff's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Woodruff's Medicare patients by sex, 2024
- Women18865%
- Men10135%
Chronic conditions among Dr. Woodruff's Medicare patients, 2024
- High cholesterol75%
- High blood pressure63%
- Arthritis48%
- Osteoporosis33%
- Chronic kidney disease23%
- Mood disorders22%
- Depression20%
- Cancer18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Woodruff's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 78
Patient panel by sex, all payers
- Women68%
- Men29%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gillian Reed Woodruff wrote 2,477 Medicare Part D claims in 2024
In 2024, Dr. Woodruff wrote 2,477 Medicare Part D claims for 428 patients. 91% of them were for generic drugs. CMS names the drug for 1,935 of them, across 64 drugs with 11 or more claims each, at $117,928 in total drug cost. In 2023, CMS named 38 claims across 2 drugs.
Dr. Woodruff's Part D claims by kind of drug, 2024
- Generic2,246 claims91%
- Brand-name and other231 claims9%
Dr. Woodruff'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. Woodruff's Part D claims, 2024
- Opioids2%58 of 2,477 claims
- Antibiotics1%22 of 2,477 claims
- Antipsychotics, patients 65 and over1%17 of 2,477 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: 382024: 1,9354992%
Drugs named by CMS: 64 in 2024, 2 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. Gillian Reed Woodruff takes part in Medicare
Dr. Woodruff 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. Gillian Reed Woodruff received $21 in industry payments in 2023
CMS Open Payments shows 1 general payment to Dr. Woodruff from 1 drug or device company in 2023. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $21.
Companies that paid Dr. Woodruff the most, 2023 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gillian Reed Woodruff graduated from St. George's University School of Medicine
Dr. Woodruff graduated from St. George's University School of Medicine in 2020.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Gillian Reed Woodruff accepts plans from 1 insurance carrier
Dr. Woodruff is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
Source: Dmand AI Insurance Network Data
Sources for Dr. Gillian Reed Woodruff'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 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 |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Gillian Reed Woodruff
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. Gillian Reed Woodruff's NPI number?
Dr. Gillian Reed Woodruff's NPI number is 1598394496. It was assigned on April 3, 2020, and it is active in the NPI Registry.
What kind of doctor is Dr. Gillian Reed Woodruff?
Dr. Gillian Reed Woodruff is an internist in Manteca, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gillian Reed Woodruff practice?
Dr. Woodruff practices at 1205 E North St, Manteca, CA 95336. Dr. Woodruff's primary practice is Doctors Hospital of Manteca in Manteca, California. Dmand AI also links Dr. Woodruff to 1 hospital and 4 medical groups.
What is Dr. Gillian Reed Woodruff's office phone number?
The practice phone on file for Dr. Woodruff is (209) 823-3111.
What is Dr. Gillian Reed Woodruff's medical license number?
Dr. Woodruff's California license number on file is A192204.
Which hospitals is Dr. Gillian Reed Woodruff affiliated with?
Dr. Woodruff is affiliated with Hopi Health Care Center. Dmand AI links Dr. Woodruff to 1 more hospital.
What medical group is Dr. Gillian Reed Woodruff part of?
Dr. Woodruff is linked to Hopi Health Care Center. Dmand AI links Dr. Woodruff to 4 more medical groups.
Does Dr. Gillian Reed Woodruff accept Medicare?
Yes. CMS data shows Dr. Woodruff billed Medicare for 441 services in 2024, and Dr. Woodruff accepts Medicare assignment.
How many Medicare patients does Dr. Gillian Reed Woodruff see?
CMS counts 289 Medicare patients who saw Dr. Woodruff in 2024, with an average age of 77.
Is Dr. Gillian Reed Woodruff board certified?
Yes. Dr. Woodruff is board certified in internal medicine by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Gillian Reed Woodruff bill to Medicare?
In 2024, Dr. Woodruff's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99212) and medicare service (G0439).
Where did Dr. Gillian Reed Woodruff go to medical school?
Dr. Woodruff graduated from St. George's University School of Medicine in 2020.
What drugs does Dr. Gillian Reed Woodruff prescribe most?
In 2024 Medicare Part D data, Dr. Woodruff's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Rosuvastatin Calcium.
Has Dr. Gillian Reed Woodruff received payments from drug or device companies?
CMS Open Payments shows $21 in general payments to Dr. Woodruff from 1 company from 2023 to 2023. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Gillian Reed Woodruff been practicing?
Dr. Woodruff graduated from medical school in 2020, 6 years ago.
What insurance does Dr. Gillian Reed Woodruff accept?
Dr. Woodruff is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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