Dr. Caitlin Macmillen, DO
- Medicare services, 2024
- 567
- Medicare patients, 2024
- 135
- Part D claims, 2024
- 1,128
- Hospital affiliations
- 1
- Medical group
- 1
- Practice address
- 200 W Arbor Dr, San Diego, CA 92103
- Practice phone
- Call (619) 543-6222
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
UCSD Hillcrest Medical Center
San Diego, California
Find Dr. Macmillen'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. Caitlin Macmillen is a family medicine physician in San Diego, California
Dr. Macmillen practices at UCSD Hillcrest Medical Center in San Diego, California.
Dr. Macmillen's NPI, 1518321629, was assigned on April 6, 2016. Dr. Macmillen holds California license 20A16037.
- NPI
- 1518321629NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8325370190
- NPI enumeration date
- April 6, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (619) 543-6222
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Caitlin Macmillen practices at UCSD Hillcrest Medical Center in San Diego, California
Dr. Macmillen's primary practice is UCSD Hillcrest Medical Center, at 200 W Arbor Dr, San Diego, CA 92103 in San Diego County. The practice phone is (619) 543-6222.
- UCSD Hillcrest Medical Center200 W Arbor Dr, San Diego, CA 92103 · San Diego CountyPhone(619) 543-6222
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Caitlin Macmillen is affiliated with 2 sites of care and 1 medical group
Dr. Macmillen's primary practice is UCSD Hillcrest Medical Center in San Diego, California. Dr. Macmillen is also affiliated with Hillcrest Medical Center. The medical group on file is UC San Diego Health.
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. Caitlin Macmillen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Macmillen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCSD Hillcrest Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Caitlin Macmillen is one of 15,680 family medicine physicians in California
Family medicine is Dr. Macmillen's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Macmillen is licensed in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Family medicine physicians near Dr. Macmillen
Counts of family 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. Caitlin Macmillen billed Medicare for 567 services in 2024
CMS data shows 567 Medicare services from Dr. Macmillen across 7 procedure codes in 2024, for 135 Medicare patients. Medicare paid $27,054 for them. Every service was in an office.
Dr. Macmillen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2212024: 28730%
- Other services
- 2023: 532024: 190258%
- Tests and treatments
- 2023: 492024: 9084%
Dr. Macmillen compared with the California median for family medicine physicians, 2024
- Dr. Macmillen
- California median
- Medicare services
- 567vs 2462.3 times
- Medicare patients
- 135vs 11814% above
- Part D claims
- 662vs 83321% below
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Macmillen'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
Dr. Caitlin Macmillen treated 135 Medicare patients in 2024, average age 71
CMS counts 135 Medicare patients who saw Dr. Macmillen in 2024. The largest group is 65 to 74, with 68 patients. 56% of them have high cholesterol, and 55% have arthritis. 27% are also on Medicaid. Their average risk score is 1.33, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Macmillen's median patient age at 49, with 68% women.
Dr. Macmillen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Macmillen's Medicare patients by sex, 2024
- Women8865%
- Men4735%
Chronic conditions among Dr. Macmillen's Medicare patients, 2024
- High cholesterol56%
- Arthritis55%
- High blood pressure54%
- Mood disorders28%
- Depression26%
- Osteoporosis26%
- Anxiety24%
- Cancer23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Macmillen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 49
Patient panel by sex, all payers
- Women68%
- Men31%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Caitlin Macmillen wrote 1,128 Medicare Part D claims in 2024
In 2024, Dr. Macmillen wrote 1,128 Medicare Part D claims for 118 patients. 87% of them were for generic drugs. CMS names the drug for 662 of them, across 27 drugs with 11 or more claims each, at $83,235 in total drug cost. In 2023, CMS named 504 claims across 24 drugs.
Dr. Macmillen's Part D claims by kind of drug, 2024
- Generic976 claims87%
- Brand-name and other152 claims13%
Dr. Macmillen'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. Macmillen's Part D claims, 2024
- Opioids2%27 of 1,128 claims
- Antibiotics2%22 of 1,128 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: 5042024: 66231%
Drugs named by CMS: 27 in 2024, 24 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
Dr. Caitlin Macmillen offers telehealth to Medicare patients
Dr. Macmillen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Macmillen as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Sources for Dr. Caitlin Macmillen'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)Doctors and Clinicians Utilization Data (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. Caitlin Macmillen
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. Caitlin Macmillen's NPI number?
Dr. Caitlin Macmillen's NPI number is 1518321629. It was assigned on April 6, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Caitlin Macmillen?
Dr. Caitlin Macmillen is a family medicine physician in San Diego, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Caitlin Macmillen practice?
Dr. Macmillen practices at 200 W Arbor Dr, San Diego, CA 92103. Dr. Macmillen's primary practice is UCSD Hillcrest Medical Center in San Diego, California.
What is Dr. Caitlin Macmillen's office phone number?
The practice phone on file for Dr. Macmillen is (619) 543-6222.
What is Dr. Caitlin Macmillen's medical license number?
Dr. Macmillen holds California license 20A16037.
Which hospitals is Dr. Caitlin Macmillen affiliated with?
Dr. Macmillen is affiliated with Hillcrest Medical Center.
What medical group is Dr. Caitlin Macmillen part of?
Dr. Macmillen is linked to UC San Diego Health.
Does Dr. Caitlin Macmillen accept Medicare?
Yes. CMS data shows Dr. Macmillen billed Medicare for 567 services in 2024, and Dr. Macmillen accepts Medicare assignment.
Does Dr. Caitlin Macmillen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Macmillen as offering telehealth services.
How many Medicare patients does Dr. Caitlin Macmillen see?
CMS counts 135 Medicare patients who saw Dr. Macmillen in 2024, with an average age of 71.
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What services does Dr. Caitlin Macmillen bill to Medicare?
In 2024, Dr. Macmillen's most billed Medicare services were medicare service (G2211), office visit, established patient (99213) and office visit, established patient (99214).
What drugs does Dr. Caitlin Macmillen prescribe most?
In 2024 Medicare Part D data, Dr. Macmillen's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Gabapentin.
How long has Dr. Caitlin Macmillen been practicing?
Dr. Macmillen graduated from medical school in 2016, 10 years ago.
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