Dr. Dan M. Chaffee, MD
- Medicare services, 2021
- 198
- Part D claims, 2024
- 1,391
- Hospital affiliations
- 1
- Industry payments
- $440
- Medical groups
- 4
- Practice address
- 900 E Hamilton Ave, Campbell, CA 95008
- Practice phone
- Call (469) 466-7007
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Signify Health
Campbell, California
Find Dr. Chaffee'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. Dan M. Chaffee is an emergency medicine physician in Campbell, California
Dr. Chaffee practices at Signify Health in Campbell, California.
Dr. Chaffee's NPI, 1528003308, was assigned on June 17, 2006. Dr. Chaffee holds Indiana license 01040042A.
- NPI
- 1528003308NPI Registry (opens in a new tab)
- NPI enumeration date
- June 17, 2006
- NPI status
- Active
- Practice phone
- (469) 466-7007
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Dan M. Chaffee practices at Signify Health in Campbell, California
Dr. Chaffee's primary practice is Signify Health, at 900 E Hamilton Ave, Campbell, CA 95008 in Santa Clara County. The practice phone is (469) 466-7007.
- Signify Health900 E Hamilton Ave, Campbell, CA 95008 · Santa Clara CountyPhone(469) 466-7007
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Dan M. Chaffee is affiliated with 2 sites of care and 4 medical groups
Dr. Chaffee's primary practice is Signify Health in Campbell, California. Dr. Chaffee is also affiliated with Corewell Health Lakeland Hospitals - Saint Joseph Hospital. The medical group on file is Signify Health. Dmand AI also links Dr. Chaffee to 3 more 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. Dan M. Chaffee's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chaffee practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Signify Health | Available with a free account |
| +1 more site and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Dan M. Chaffee is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Chaffee's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Chaffee's licenses on file in 2 states: Indiana and Michigan.
Specialties and state licenses
- Emergency medicine, IndianaPrimary
- Emergency medical services (emergency medicine), Michigan
Emergency medicine physicians near Dr. Chaffee
Counts of emergency medicine 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. Dan M. Chaffee billed Medicare for 198 services in 2021
CMS data shows 198 Medicare services from Dr. Chaffee across 2 procedure codes in 2021. Medicare paid $9,638 for them. Every service was in an office.
Dr. Chaffee's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 5992021: 19867%
Dr. Chaffee compared with the California median for emergency medicine physicians, 2021
- Dr. Chaffee
- California median
- Medicare services
- 198vs 26525% below
- Part D claims
- 1,352vs 6221.8 times
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Chaffee's most billed Medicare procedure codes, 2021
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. Chaffee and other emergency medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Dan M. Chaffee's patients have a median age of 70
Across all payers, Dmand AI patient panel data puts Dr. Chaffee's median patient age at 70, with 48% women.
Dr. Chaffee's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women48%
- Men51%
Source: Dmand AI Patient Panel Data
Dr. Dan M. Chaffee wrote 1,391 Medicare Part D claims in 2024
In 2024, Dr. Chaffee wrote 1,391 Medicare Part D claims for 20 patients. 89% of them were for generic drugs. CMS names the drug for 1,352 of them, across 26 drugs with 11 or more claims each, at $38,835 in total drug cost. In 2022, CMS named 660 claims across 32 drugs.
Dr. Chaffee's Part D claims by kind of drug, 2024
- Generic1,237 claims89%
- Brand-name154 claims11%
Dr. Chaffee'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. Chaffee's Part D claims, 2024
- Antipsychotics, patients 65 and over3%45 of 1,391 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, 2022 to 2024
- 2022
- 2024
- Claims for drugs CMS names
- 2022: 6602024: 1,352105%
Drugs named by CMS: 26 in 2024, 32 in 2022.
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
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Dr. Dan M. Chaffee received $440 in industry payments from 2016 to 2025
CMS Open Payments shows 20 general payments to Dr. Chaffee from 3 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. UCB, Inc. paid the most, $252.
General payments to Dr. Chaffee by program year, 2016 to 2025
Companies that paid Dr. Chaffee the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Dan M. Chaffee'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 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) |
| 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. Dan M. Chaffee
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. Dan M. Chaffee's NPI number?
Dr. Dan M. Chaffee's NPI number is 1528003308. It was assigned on June 17, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Dan M. Chaffee?
Dr. Dan M. Chaffee is an emergency medicine physician in Campbell, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Dan M. Chaffee practice?
Dr. Chaffee practices at 900 E Hamilton Ave, Campbell, CA 95008. Dr. Chaffee's primary practice is Signify Health in Campbell, California. Dmand AI also links Dr. Chaffee to 3 medical groups.
What is Dr. Dan M. Chaffee's office phone number?
The practice phone on file for Dr. Chaffee is (469) 466-7007.
What is Dr. Dan M. Chaffee's medical license number?
Dr. Chaffee holds Indiana license 01040042A, one of the licenses on file in 2 states.
Which states has Dr. Dan M. Chaffee been licensed in?
Dmand AI has state licenses on file for Dr. Chaffee in Indiana and Michigan.
Which hospitals is Dr. Dan M. Chaffee affiliated with?
Dr. Chaffee is affiliated with Corewell Health Lakeland Hospitals - Saint Joseph Hospital.
What medical group is Dr. Dan M. Chaffee part of?
Dr. Chaffee is linked to Signify Health. Dmand AI links Dr. Chaffee to 3 more medical groups.
Does Dr. Dan M. Chaffee accept Medicare?
Yes. CMS data shows Dr. Chaffee billed Medicare for 198 services in 2021.
What services does Dr. Dan M. Chaffee bill to Medicare?
In 2021, Dr. Chaffee's most billed Medicare services were nursing facility care (99308) and nursing facility care (99307).
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What drugs does Dr. Dan M. Chaffee prescribe most?
In 2024 Medicare Part D data, Dr. Chaffee's most prescribed drugs by claims were Atorvastatin Calcium, Levetiracetam and Venlafaxine HCl ER.
Has Dr. Dan M. Chaffee received payments from drug or device companies?
CMS Open Payments shows $440 in general payments to Dr. Chaffee from 3 companies from 2016 to 2025. The largest total came from UCB, Inc.
How long has Dr. Dan M. Chaffee been practicing?
Dr. Chaffee's NPI was assigned in 2006.
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