Dr. Francisco Saguil Perez, MD
- Medicare services, 2024
- 359
- Medicare patients, 2024
- 194
- Part D claims, 2024
- 158
- Publications
- 2
- Hospital affiliations
- 2
- Practice address
- 27700 Medical Center Rd, Mission Viejo, CA 92691
- Practice phone
- Call (949) 365-2447
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mission Hospital - Unit
Acute Care Hospital-Unit · Mission Viejo, California
Find Dr. Perez's professional email, personal email and mobile number
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Dr. Francisco Saguil Perez is an internist in Mission Viejo, California
Dr. Perez practices at Mission Hospital - Unit in Mission Viejo, California.
Dr. Perez's NPI, 1841262763, was assigned on February 3, 2006. Dr. Perez graduated from De La Salle University College of Medicine in 1999. Dr. Perez holds California license C53915.
- NPI
- 1841262763NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5092748996
- NPI enumeration date
- February 3, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (949) 365-2447
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Francisco Saguil Perez practices at Mission Hospital - Unit in Mission Viejo, California
Dr. Perez's primary practice is Mission Hospital - Unit, at 27700 Medical Center Rd, Mission Viejo, CA 92691 in Orange County. The practice phone is (949) 365-2447.
- Mission Hospital - Unit27700 Medical Center Rd, Mission Viejo, CA 92691 · Orange CountyPhone(949) 365-2447
Source: Dmand AI Affiliation Data
Dr. Francisco Saguil Perez is affiliated with 4 sites of care and 2 medical groups
Dr. Perez's primary practice is Mission Hospital - Unit in Mission Viejo, California. Dr. Perez is also affiliated with Providence Mission Hospital. The medical group on file is St. Jude Heritage Medical Group. Dmand AI also links Dr. Perez to 2 more group practices and clinics and 1 medical group, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Francisco Saguil Perez's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Perez practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mission Hospital - Unit | 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. Francisco Saguil Perez is one of 16,751 internists in California
Internal medicine is Dr. Perez's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Perez is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Perez's licenses on file in 2 states: California and Missouri.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Missouri license
Clinical focus
Dmand AI lists acute respiratory failure, bile duct problems, cellulitis, circulation problems, collapsed lung, congestive heart failure, gastrointestinal bleeding and gastrointestinal infection among the conditions Dr. Perez treats.
Internists near Dr. Perez
Counts of internists 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. Francisco Saguil Perez billed Medicare for 359 services in 2024
CMS data shows 359 Medicare services from Dr. Perez across 6 procedure codes in 2024, for 194 Medicare patients. Medicare paid $35,458 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Perez's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2332024: 35954%
Dr. Perez compared with the California median for internists, 2024
- Dr. Perez
- California median
- Medicare services
- 359vs 361Close to median
- Medicare patients
- 194vs 15128% above
- Part D claims
- 12vs 42197% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Perez'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.
Need commercial claims for Dr. Perez?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Perez and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Francisco Saguil Perez treated 194 Medicare patients in 2024, average age 77
CMS counts 194 Medicare patients who saw Dr. Perez in 2024. The largest group is 75 to 84, with 77 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 16% are also on Medicaid. Their average risk score is 1.57, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Perez's median patient age at 74, with 47% women.
Dr. Perez's Medicare patients by age, 2024
Dr. Perez's Medicare patients by sex, 2024
- Women10454%
- Men9046%
Chronic conditions among Dr. Perez's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis59%
- Anxiety42%
- Mood disorders42%
- Depression36%
- Ischemic heart disease34%
- Atrial fibrillation30%
Share of Medicare patients with each condition. A patient can have several.
Dr. Perez's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women47%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Francisco Saguil Perez wrote 158 Medicare Part D claims in 2024
In 2024, Dr. Perez wrote 158 Medicare Part D claims for 85 patients. 92% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $83 in total drug cost. In 2023, CMS named 110 claims across 8 drugs.
Dr. Perez's Part D claims by kind of drug, 2024
- Generic145 claims92%
- Brand-name13 claims8%
Dr. Perez'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. Perez's Part D claims, 2024
- Opioids7%11 of 158 claims
- Antibiotics26%41 of 158 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: 1102024: 1289%
Drugs named by CMS: 1 in 2024, 8 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
How Dr. Francisco Saguil Perez takes part in Medicare
Dr. Perez 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. Francisco Saguil Perez has 2 publications on record
Dmand AI links 2 papers to Dr. Perez.
Recent publications by Dr. Perez
See who Dr. Perez researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Perez works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Francisco Saguil Perez received $401 in industry payments from 2016 to 2025
CMS Open Payments shows 8 general payments to Dr. Perez from 6 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Otsuka America Pharmaceutical, Inc. paid the most, $119.
General payments to Dr. Perez by program year, 2016 to 2025
Companies that paid Dr. Perez 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. Francisco Saguil Perez graduated from De La Salle University College of Medicine
Dr. Perez graduated from De La Salle University College of Medicine in 1999.
- Medical school
- Board certified in internal medicine
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Francisco Saguil Perez accepts plans from 12 insurance carriers
Dr. Perez is in network with 12 carriers, including United Healthcare, Blue Cross Blue Shield of Michigan and HCSC. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
- United Healthcare
- Blue Cross Blue Shield of Michigan
- HCSC
- Aetna
- Blue Cross Blue Shield of Massachusetts
- Elevance
- Regence Health Plans
- Alliant Health Plans
- +4 more carriersWith a free account
Plan types Dr. Perez accepts, by number of carriers
- PPO7
- HMO6
- Medicare6
- EPO3
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Francisco Saguil Perez'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 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) |
| 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. Francisco Saguil Perez
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. Francisco Saguil Perez's NPI number?
Dr. Francisco Saguil Perez's NPI number is 1841262763. It was assigned on February 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Francisco Saguil Perez?
Dr. Francisco Saguil Perez is an internist in Mission Viejo, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Francisco Saguil Perez practice?
Dr. Perez practices at 27700 Medical Center Rd, Mission Viejo, CA 92691. Dr. Perez's primary practice is Mission Hospital - Unit in Mission Viejo, California. Dmand AI also links Dr. Perez to 2 group practices and clinics and 1 medical group.
What is Dr. Francisco Saguil Perez's office phone number?
The practice phone on file for Dr. Perez is (949) 365-2447.
What is Dr. Francisco Saguil Perez's medical license number?
Dr. Perez holds California license C53915, one of the licenses on file in 2 states.
Which states has Dr. Francisco Saguil Perez been licensed in?
Dmand AI has state licenses on file for Dr. Perez in California (2009 to 2027) and Missouri (2005 to 2014).
Which hospitals is Dr. Francisco Saguil Perez affiliated with?
Dr. Perez is affiliated with Providence Mission Hospital. Dmand AI links Dr. Perez to 1 more hospital.
What medical group is Dr. Francisco Saguil Perez part of?
Dr. Perez is linked to St. Jude Heritage Medical Group. Dmand AI links Dr. Perez to 1 more medical group.
Does Dr. Francisco Saguil Perez accept Medicare?
Yes. CMS data shows Dr. Perez billed Medicare for 359 services in 2024, and Dr. Perez accepts Medicare assignment.
How many Medicare patients does Dr. Francisco Saguil Perez see?
CMS counts 194 Medicare patients who saw Dr. Perez in 2024, with an average age of 77.
Show 8 more questionsShow fewer questions
Is Dr. Francisco Saguil Perez board certified?
Yes. Dr. Perez is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Francisco Saguil Perez bill to Medicare?
In 2024, Dr. Perez's most billed Medicare services were hospital inpatient care (99223), hospital inpatient care (99232) and hospital inpatient care (99239).
Where did Dr. Francisco Saguil Perez go to medical school?
Dr. Perez graduated from De La Salle University College of Medicine in 1999.
What drugs does Dr. Francisco Saguil Perez prescribe most?
In 2024 Medicare Part D data, Dr. Perez's most prescribed drugs by claims were Cefuroxime.
Has Dr. Francisco Saguil Perez received payments from drug or device companies?
CMS Open Payments shows $401 in general payments to Dr. Perez from 6 companies from 2016 to 2025. The largest total came from Otsuka America Pharmaceutical, Inc.
How long has Dr. Francisco Saguil Perez been practicing?
Dr. Perez graduated from medical school in 1999, 27 years ago.
Does Dr. Francisco Saguil Perez do research?
Dmand AI links 2 publications to Dr. Perez.
What insurance does Dr. Francisco Saguil Perez accept?
Dr. Perez is in network with 12 carriers, including United Healthcare, Blue Cross Blue Shield of Michigan and HCSC. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
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