Dr. Hillard Theophilus Spencer, MD
- Publications
- 6
- Hospital affiliations
- 1
- Industry payments
- $131
- Medical group
- 1
- Insurance carriers
- 1
- Practice address
- 441 N Lakeview Ave, Anaheim, CA 92807
- Practice phone
- Call (714) 279-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Southern California Permanente Medical Group
Anaheim, California
Find Dr. Spencer'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. Hillard Theophilus Spencer is an orthopedic surgeon in Anaheim, California
Dr. Spencer practices at Southern California Permanente Medical Group in Anaheim, California.
Dr. Spencer's NPI, 1447574215, was assigned on March 22, 2010. Dr. Spencer graduated from Vagelos College of Physicians and Surgeons in 2006. Dr. Spencer holds California license A103107.
- NPI
- 1447574215NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7618128299
- NPI enumeration date
- March 22, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 279-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Hillard Theophilus Spencer practices at Southern California Permanente Medical Group in Anaheim, California
Dr. Spencer's primary practice is Southern California Permanente Medical Group, at 441 N Lakeview Ave, Anaheim, CA 92807 in Orange County. The practice phone is (714) 279-4000.
- Southern California Permanente Medical Group441 N Lakeview Ave, Anaheim, CA 92807 · Orange CountyPhone(714) 279-4000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Hillard Theophilus Spencer is affiliated with 2 sites of care and 1 medical group
Dr. Spencer's primary practice is Southern California Permanente Medical Group in Anaheim, California. Dr. Spencer is also affiliated with Ronald Reagan UCLA Medical Center. The medical group on file is Southern California Permanente Medical Group.
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. Hillard Theophilus Spencer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Spencer practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Southern California Permanente Medical Group | 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. Hillard Theophilus Spencer is one of 2,056 orthopedic surgeons in California
Orthopaedic surgery is Dr. Spencer's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Spencer is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery. Dmand AI has Dr. Spencer's licenses on file in 2 states: California and Massachusetts.
Specialties and state licenses
- Orthopaedic surgery, CaliforniaPrimary
- Massachusetts license
Clinical focus
Dmand AI lists hip replacement among the conditions Dr. Spencer treats.
Orthopedic surgeons near Dr. Spencer
Counts of orthopedic surgeons 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. Hillard Theophilus Spencer's patients have a median age of 11
Across all payers, Dmand AI patient panel data puts Dr. Spencer's median patient age at 11, with 49% women.
Dr. Spencer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 11
Patient panel by sex, all payers
- Women49%
- Men51%
Source: Dmand AI Patient Panel Data
How Dr. Hillard Theophilus Spencer takes part in Medicare
Dr. Spencer 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)
Dr. Hillard Theophilus Spencer has 6 publications on record
Dmand AI links 6 papers to Dr. Spencer, published from 2010 to 2016. Dr. Spencer's most frequent co-authors are Donald S. Bae, MD, Carol E. Barnewolt, MD and Yi-Jen Fong, MD.
Dr. Spencer's papers by year, 2010 to 2016
Dr. Spencer's most frequent co-authors
Recent publications by Dr. Spencer
See who Dr. Spencer researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Spencer works with, so you can find a warm path to the right orthopedic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Hillard Theophilus Spencer received $131 in industry payments from 2019 to 2024
CMS Open Payments shows 3 general payments to Dr. Spencer from 2 drug and device companies from 2019 to 2024. Food and beverage make up the largest share, 100% of the total. Davol Inc. paid the most, $93.
General payments to Dr. Spencer by program year, 2019 to 2024
Companies that paid Dr. Spencer the most, 2019 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Hillard Theophilus Spencer graduated from Vagelos College of Physicians and Surgeons
Dr. Spencer graduated from Vagelos College of Physicians and Surgeons in 2006. Dr. Spencer is a member of AAOS and POSNA.
- Medical school
- Board certified in orthopaedic surgery
Source: Dmand AI Professional Profile Data
Dr. Hillard Theophilus Spencer accepts plans from 1 insurance carrier
Dr. Spencer 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. Hillard Theophilus Spencer'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Hillard Theophilus Spencer
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. Hillard Theophilus Spencer's NPI number?
Dr. Hillard Theophilus Spencer's NPI number is 1447574215. It was assigned on March 22, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Hillard Theophilus Spencer?
Dr. Hillard Theophilus Spencer is an orthopedic surgeon in Anaheim, California. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Hillard Theophilus Spencer practice?
Dr. Spencer practices at 441 N Lakeview Ave, Anaheim, CA 92807. Dr. Spencer's primary practice is Southern California Permanente Medical Group in Anaheim, California.
What is Dr. Hillard Theophilus Spencer's office phone number?
The practice phone on file for Dr. Spencer is (714) 279-4000.
What is Dr. Hillard Theophilus Spencer's medical license number?
Dr. Spencer holds California license A103107, one of the licenses on file in 2 states.
Which states has Dr. Hillard Theophilus Spencer been licensed in?
Dmand AI has state licenses on file for Dr. Spencer in California (2008 to 2027) and Massachusetts (2011 to 2020).
Which hospitals is Dr. Hillard Theophilus Spencer affiliated with?
Dr. Spencer is affiliated with Ronald Reagan UCLA Medical Center.
What medical group is Dr. Hillard Theophilus Spencer part of?
Dr. Spencer is linked to Southern California Permanente Medical Group.
Does Dr. Hillard Theophilus Spencer accept Medicare?
Yes. CMS lists Dr. Spencer as accepting Medicare assignment.
Is Dr. Hillard Theophilus Spencer board certified?
Yes. Dr. Spencer is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery.
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Where did Dr. Hillard Theophilus Spencer go to medical school?
Dr. Spencer graduated from Vagelos College of Physicians and Surgeons in 2006.
Has Dr. Hillard Theophilus Spencer received payments from drug or device companies?
CMS Open Payments shows $131 in general payments to Dr. Spencer from 2 companies from 2019 to 2024. The largest total came from Davol Inc.
How long has Dr. Hillard Theophilus Spencer been practicing?
Dr. Spencer graduated from medical school in 2006, 20 years ago.
Does Dr. Hillard Theophilus Spencer do research?
Dmand AI links 6 publications to Dr. Spencer, published from 2010 to 2016.
Who does Dr. Hillard Theophilus Spencer publish with?
Dr. Spencer's most frequent co-authors are Donald S. Bae, MD (1 shared paper), Carol E. Barnewolt, MD (1 shared paper) and Yi-Jen Fong, MD (1 shared paper).
What insurance does Dr. Hillard Theophilus Spencer accept?
Dr. Spencer 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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