Dr. Nathan Thomas Mortensen, DO
- Medicare services, 2024
- 23,354
- Medicare patients, 2024
- 2,435
- Hospital affiliations
- 8
- Industry payments
- $125
- Medical groups
- 17
- Practice address
- 11600a Indian Hills Road, Mission Hills, Ca 91345, Mission Hills, CA 91345
- Practice phone
- Call (818) 898-4630
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Sub-Acute Care Center
Skilled Nursing Facility - Hospital-Based · Mission Hills, California
Find Dr. Mortensen's professional email, personal email and mobile number
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Dr. Nathan Thomas Mortensen is a diagnostic radiologist in Mission Hills, California
Dr. Mortensen practices at Sub-Acute Care Center in Mission Hills, California.
Dr. Mortensen's NPI, 1679825400, was assigned on October 3, 2012. Dr. Mortensen holds Oregon license DO187083.
- NPI
- 1679825400NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6305085663
- NPI enumeration date
- October 3, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (818) 898-4630
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Nathan Thomas Mortensen practices at 2 locations in Mission Hills, California
Dr. Mortensen's primary practice is Sub-Acute Care Center, at 11600a Indian Hills Road, Mission Hills, Ca 91345, Mission Hills, CA 91345 in Los Angeles County. The practice phone is (818) 898-4630. Dr. Mortensen also practices at Providence Holy Cross Medical Center, 15031 W Rinaldi St, Mission Hills, CA 91345.
- Sub-Acute Care CenterPrimary11600a Indian Hills Road, Mission Hills, Ca 91345, Mission Hills, CA 91345 · Los Angeles CountyPhone(818) 898-4630
- Providence Holy Cross Medical Center15031 W Rinaldi St, Mission Hills, CA 91345 · Los Angeles CountyPhone(818) 365-8051
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Nathan Thomas Mortensen is affiliated with 13 sites of care and 17 medical groups
Dr. Mortensen's primary practice is Sub-Acute Care Center in Mission Hills, California. Dr. Mortensen is also affiliated with UCSF Helen Diller Medical Center at Parnassus Heights. The medical group on file is Radia. Dmand AI also links Dr. Mortensen to 7 more hospitals, 16 medical groups and 4 group practices and clinics, 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. Nathan Thomas Mortensen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mortensen practices, 13 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sub-Acute Care Center | Available with a free account |
| +12 more sites and 16 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Nathan Thomas Mortensen is one of 4,096 diagnostic radiologists in California
Diagnostic radiology is Dr. Mortensen's primary specialty in the NPI Registry, under taxonomy code 2085R0202X. Dr. Mortensen is licensed in Oregon.
Specialties and state licenses
- Diagnostic radiology, OregonPrimary
Diagnostic radiologists near Dr. Mortensen
Counts of diagnostic radiologists 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. Nathan Thomas Mortensen billed Medicare for 23,354 services in 2024
CMS data shows 23,354 Medicare services from Dr. Mortensen across 42 procedure codes in 2024, for 2,435 Medicare patients. Medicare paid $168,296 for them.
Dr. Mortensen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 5,6852024: 20,470260%
- Imaging
- 2023: 3,5022024: 2,88418%
Where Dr. Mortensen's Medicare services took place, 2024
- In an office21,09890%
- In a facility2,25610%
Dr. Mortensen compared with the California median for diagnostic radiologists, 2024
- Dr. Mortensen
- California median
- Medicare services
- 23,354vs 2,28110.2 times
- Medicare patients
- 2,435vs 1,34681% above
Medians across 3,734 diagnostic radiologists in California with Dmand AI profiles that report each measure.
Dr. Mortensen'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. Mortensen and other diagnostic radiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nathan Thomas Mortensen treated 2,435 Medicare patients in 2024, average age 73
CMS counts 2,435 Medicare patients who saw Dr. Mortensen in 2024. The largest group is 65 to 74, with 1,116 patients. 69% of them have high blood pressure, and 69% have high cholesterol. 16% are also on Medicaid. Their average risk score is 1.31, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Mortensen's median patient age at 67, with 58% women.
Dr. Mortensen's Medicare patients by age, 2024
Dr. Mortensen's Medicare patients by sex, 2024
- Women1,43859%
- Men99741%
Chronic conditions among Dr. Mortensen's Medicare patients, 2024
- High blood pressure69%
- High cholesterol69%
- Arthritis64%
- Mood disorders31%
- Anxiety27%
- Depression27%
- Ischemic heart disease24%
- Diabetes23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mortensen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women58%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Nathan Thomas Mortensen takes part in Medicare
Dr. Mortensen 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. Nathan Thomas Mortensen received $125 in industry payments in 2025
CMS Open Payments shows 2 general payments to Dr. Mortensen from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Ethicon Inc. paid the most, $125.
Companies that paid Dr. Mortensen the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Nathan Thomas Mortensen'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 Affiliation DataDmand AI Practice 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) |
| 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. Nathan Thomas Mortensen
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. Nathan Thomas Mortensen's NPI number?
Dr. Nathan Thomas Mortensen's NPI number is 1679825400. It was assigned on October 3, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Nathan Thomas Mortensen?
Dr. Nathan Thomas Mortensen is a diagnostic radiologist in Mission Hills, California. The primary specialty in the NPI Registry is Diagnostic Radiology Physician (taxonomy code 2085R0202X).
Where does Dr. Nathan Thomas Mortensen practice?
Dr. Mortensen practices at 11600a Indian Hills Road, Mission Hills, Ca 91345, Mission Hills, CA 91345. Dr. Mortensen also practices at 15031 W Rinaldi St, Mission Hills, CA 91345. Dr. Mortensen's primary practice is Sub-Acute Care Center in Mission Hills, California. Dmand AI also links Dr. Mortensen to 7 hospitals, 16 medical groups and 4 group practices and clinics.
What is Dr. Nathan Thomas Mortensen's office phone number?
The practice phone on file for Dr. Mortensen is (818) 898-4630.
What is Dr. Nathan Thomas Mortensen's medical license number?
Dr. Mortensen holds Oregon license DO187083.
Which hospitals is Dr. Nathan Thomas Mortensen affiliated with?
Dr. Mortensen is affiliated with UCSF Helen Diller Medical Center at Parnassus Heights. Dmand AI links Dr. Mortensen to 7 more hospitals.
What medical group is Dr. Nathan Thomas Mortensen part of?
Dr. Mortensen is linked to Radia. Dmand AI links Dr. Mortensen to 16 more medical groups.
Does Dr. Nathan Thomas Mortensen accept Medicare?
Yes. CMS data shows Dr. Mortensen billed Medicare for 23,354 services in 2024, and Dr. Mortensen accepts Medicare assignment.
How many Medicare patients does Dr. Nathan Thomas Mortensen see?
CMS counts 2,435 Medicare patients who saw Dr. Mortensen in 2024, with an average age of 73.
What services does Dr. Nathan Thomas Mortensen bill to Medicare?
In 2024, Dr. Mortensen's most billed Medicare services were medical supplies or transport (A9585), diagnostic imaging (70553) and diagnostic imaging (71045).
Has Dr. Nathan Thomas Mortensen received payments from drug or device companies?
CMS Open Payments shows $125 in general payments to Dr. Mortensen from 1 company from 2025 to 2025. The largest total came from Ethicon Inc.
How long has Dr. Nathan Thomas Mortensen been practicing?
Dr. Mortensen graduated from medical school in 2012, 14 years ago.
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