Dr. Allison K. Duffy, MD
- Medicare services, 2024
- 227
- Medicare patients, 2024
- 240
- Hospital affiliations
- 1
- Industry payments
- $346
- Medical groups
- 2
- Practice address
- 365 Lennon Lane, Suite 100, Walnut Creek, CA 94598
- Practice phone
- Call (925) 939-4600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Walnut Creek Endoscopy Center
Surgery Center - Medicare-Certified · Walnut Creek, California
Find Dr. Duffy's professional email, personal email and mobile number
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Dr. Allison K. Duffy is an anesthesiologist in Walnut Creek, California
Dr. Duffy practices at Walnut Creek Endoscopy Center in Walnut Creek, California.
Dr. Duffy's NPI, 1548484835, was assigned on April 11, 2007. Dr. Duffy graduated from University of Wisconsin-Madison in 2005. Dr. Duffy holds California license A98122.
- NPI
- 1548484835NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6901950864
- NPI enumeration date
- April 11, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (925) 939-4600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Allison K. Duffy practices at Walnut Creek Endoscopy Center in Walnut Creek, California
Dr. Duffy's primary practice is Walnut Creek Endoscopy Center, at 365 Lennon Lane, Suite 100, Walnut Creek, CA 94598. The practice phone is (925) 939-4600.
- Walnut Creek Endoscopy Center365 Lennon Lane, Suite 100, Walnut Creek, CA 94598Phone(925) 939-4600
Source: Dmand AI Affiliation Data
Dr. Allison K. Duffy is affiliated with 4 sites of care and 2 medical groups
Dr. Duffy's primary practice is Walnut Creek Endoscopy Center in Walnut Creek, California. Dr. Duffy is also affiliated with Good Samaritan Hospital. The medical group on file is G2 Anesthesia. Dmand AI also links Dr. Duffy to 1 more dialysis center, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Allison K. Duffy's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Duffy practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Walnut Creek Endoscopy Center | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Allison K. Duffy is one of 6,593 anesthesiologists in California
Anesthesiology is Dr. Duffy's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Duffy is board certified in anesthesiology by the American Board of Anesthesiology. Dr. Duffy is licensed in California.
Specialties and state licenses
- Anesthesiology, CaliforniaPrimary
Anesthesiologists near Dr. Duffy
Counts of anesthesiologists 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. Allison K. Duffy billed Medicare for 227 services in 2024
CMS data shows 227 Medicare services from Dr. Duffy across 5 procedure codes in 2024, for 240 Medicare patients. Medicare paid $27,103 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Duffy's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 1832024: 22724%
Dr. Duffy compared with the California median for anesthesiologists, 2024
- Dr. Duffy
- California median
- Medicare services
- 227vs 723.2 times
- Medicare patients
- 240vs 14368% above
Medians across 5,562 anesthesiologists in California with Dmand AI profiles that report each measure.
Dr. Duffy'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Duffy and other anesthesiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Allison K. Duffy treated 240 Medicare patients in 2024, average age 74
CMS counts 240 Medicare patients who saw Dr. Duffy in 2024. The largest group is 65 to 74, with 116 patients. 75% of them have high cholesterol, and 64% have high blood pressure. 13% are also on Medicaid. Their average risk score is 0.91, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Duffy's median patient age at 62, with 53% women.
Dr. Duffy's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Duffy's Medicare patients by sex, 2024
- Women12653%
- Men11448%
Chronic conditions among Dr. Duffy's Medicare patients, 2024
- High cholesterol75%
- High blood pressure64%
- Arthritis43%
- Diabetes25%
- Cancer19%
- Chronic kidney disease19%
- Osteoporosis18%
- Atrial fibrillation17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Duffy's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women53%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Allison K. Duffy takes part in Medicare
Dr. Duffy 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. Allison K. Duffy received $346 in industry payments from 2016 to 2025
CMS Open Payments shows 18 general payments to Dr. Duffy from 9 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Synergy Pharmaceuticals Inc paid the most, $112.
General payments to Dr. Duffy by program year, 2016 to 2025
Companies that paid Dr. Duffy the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Allison K. Duffy graduated from University of Wisconsin-Madison
Dr. Duffy graduated from University of Wisconsin-Madison in 2005.
- Medical school
- Board certified in anesthesiology
Source: Dmand AI Professional Profile Data
Dr. Allison K. Duffy accepts plans from 3 insurance carriers
Dr. Duffy is in network with 3 carriers, including Blue Cross Blue Shield of Michigan, HCSC and CMS Medicare. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- HCSC
- CMS Medicare
Plan types Dr. Duffy accepts, by number of carriers
- Medicare2
- PPO2
- HMO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Allison K. Duffy'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) |
| 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. Allison K. Duffy
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. Allison K. Duffy's NPI number?
Dr. Allison K. Duffy's NPI number is 1548484835. It was assigned on April 11, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Allison K. Duffy?
Dr. Allison K. Duffy is an anesthesiologist in Walnut Creek, California. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Allison K. Duffy practice?
Dr. Duffy practices at 365 Lennon Lane, Suite 100, Walnut Creek, CA 94598. Dr. Duffy's primary practice is Walnut Creek Endoscopy Center in Walnut Creek, California. Dmand AI also links Dr. Duffy to 1 dialysis center, 1 group practice or clinic and 1 medical group.
What is Dr. Allison K. Duffy's office phone number?
The practice phone on file for Dr. Duffy is (925) 939-4600.
What is Dr. Allison K. Duffy's medical license number?
Dr. Duffy holds California license A98122.
Which hospitals is Dr. Allison K. Duffy affiliated with?
Dr. Duffy is affiliated with Good Samaritan Hospital.
What medical group is Dr. Allison K. Duffy part of?
Dr. Duffy is linked to G2 Anesthesia. Dmand AI links Dr. Duffy to 1 more medical group.
Does Dr. Allison K. Duffy accept Medicare?
Yes. CMS data shows Dr. Duffy billed Medicare for 227 services in 2024, and Dr. Duffy accepts Medicare assignment.
How many Medicare patients does Dr. Allison K. Duffy see?
CMS counts 240 Medicare patients who saw Dr. Duffy in 2024, with an average age of 74.
Is Dr. Allison K. Duffy board certified?
Yes. Dr. Duffy is board certified in anesthesiology by the American Board of Anesthesiology.
Show 5 more questionsShow fewer questions
What services does Dr. Allison K. Duffy bill to Medicare?
In 2024, Dr. Duffy's most billed Medicare services were anesthesia (00811), anesthesia (00731) and anesthesia (00813).
Where did Dr. Allison K. Duffy go to medical school?
Dr. Duffy graduated from University of Wisconsin-Madison in 2005.
Has Dr. Allison K. Duffy received payments from drug or device companies?
CMS Open Payments shows $346 in general payments to Dr. Duffy from 9 companies from 2016 to 2025. The largest total came from Synergy Pharmaceuticals Inc.
How long has Dr. Allison K. Duffy been practicing?
Dr. Duffy graduated from medical school in 2005, 21 years ago.
What insurance does Dr. Allison K. Duffy accept?
Dr. Duffy is in network with 3 carriers, including Blue Cross Blue Shield of Michigan, HCSC and CMS Medicare. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
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