Guisou Mahmoud
- Medicare services, 2024
- 185
- Medicare patients, 2024
- 133
- Part D claims, 2024
- 93
- Hospital affiliations
- 2
- Industry payments
- $396
- 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 Guisou Mahmoud'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.
Guisou Mahmoud is an emergency medicine physician in Mission Viejo, California
Guisou Mahmoud practices at Mission Hospital - Unit in Mission Viejo, California.
Guisou Mahmoud's NPI, 1164435996, was assigned on August 14, 2006. Guisou Mahmoud graduated from St. George's University School of Medicine in 1998. Guisou Mahmoud's California license number on file is A79774.
- NPI
- 1164435996NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7012913890
- NPI enumeration date
- August 14, 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
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Guisou Mahmoud practices at Mission Hospital - Unit in Mission Viejo, California
Guisou Mahmoud'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
Guisou Mahmoud is affiliated with 3 sites of care and 3 medical groups
Guisou Mahmoud's primary practice is Mission Hospital - Unit in Mission Viejo, California. Guisou Mahmoud is also affiliated with Providence Mission Hospital. The medical group on file is Emergency Medicine Physicians. Dmand AI also links Guisou Mahmoud to 2 more medical groups and 1 group practice or clinic, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Guisou Mahmoud's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Guisou Mahmoud practices, 3 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 |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Guisou Mahmoud is one of 7,423 emergency medicine physicians in California
Emergency medicine is Guisou Mahmoud's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Guisou Mahmoud is board certified in emergency medicine by the American Board of Emergency Medicine. Guisou Mahmoud has a license on file in California.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
Emergency medicine physicians near Guisou Mahmoud
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
Guisou Mahmoud billed Medicare for 185 services in 2024
CMS data shows 185 Medicare services from Guisou Mahmoud across 5 procedure codes in 2024, for 133 Medicare patients. Medicare paid $15,943 for them. Every service was in a facility, such as a hospital, rather than an office.
Guisou Mahmoud's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2192024: 13140%
- Tests and treatments
- 2023: 622024: 5413%
Guisou Mahmoud compared with the California median for emergency medicine physicians, 2024
- Guisou Mahmoud
- California median
- Medicare services
- 185vs 26530% below
- Medicare patients
- 133vs 24345% below
- Part D claims
- 12vs 6281% below
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Guisou Mahmoud'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 Guisou Mahmoud?
Medicare shows one payer. Book a meeting to get commercial claims data for Guisou Mahmoud and other emergency medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Guisou Mahmoud treated 133 Medicare patients in 2024, average age 75
CMS counts 133 Medicare patients who saw Guisou Mahmoud in 2024. The largest group is 75 to 84, with 50 patients. 71% of them have high cholesterol, and 69% have high blood pressure. 12% are also on Medicaid. Their average risk score is 1.38, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Guisou Mahmoud's median patient age at 58, with 54% women.
Guisou Mahmoud's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Guisou Mahmoud's Medicare patients by sex, 2024
- Women6952%
- Men6448%
Chronic conditions among Guisou Mahmoud's Medicare patients, 2024
- High cholesterol71%
- High blood pressure69%
- Arthritis56%
- Anxiety29%
- Mood disorders29%
- Depression26%
- Ischemic heart disease26%
- Atrial fibrillation24%
Share of Medicare patients with each condition. A patient can have several.
Guisou Mahmoud's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Guisou Mahmoud wrote 93 Medicare Part D claims in 2024
In 2024, Guisou Mahmoud wrote 93 Medicare Part D claims for 66 patients. 95% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $43 in total drug cost. In 2023, CMS named 40 claims across 2 drugs.
Guisou Mahmoud's Part D claims by kind of drug, 2024
- Generic88 claims95%
- Brand-name and other5 claims5%
Guisou Mahmoud'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 Guisou Mahmoud's Part D claims, 2024
- Opioids16%15 of 93 claims
- Antibiotics33%31 of 93 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: 402024: 1270%
Drugs named by CMS: 1 in 2024, 2 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 Guisou Mahmoud takes part in Medicare
Guisou Mahmoud 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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Guisou Mahmoud received $396 in industry payments from 2016 to 2024
CMS Open Payments shows 3 general payments to Guisou Mahmoud from 3 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 78% of the total. Ceribell, Inc. paid the most, $190.
General payments to Guisou Mahmoud by program year, 2016 to 2024
General payments to Guisou Mahmoud by kind, 2016 to 2024
- Food and beverage$31078%
- Entertainment$8622%
Companies that paid Guisou Mahmoud the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Guisou Mahmoud graduated from St. George's University School of Medicine
Guisou Mahmoud graduated from St. George's University School of Medicine in 1998.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Guisou Mahmoud accepts plans from 2 insurance carriers
Guisou Mahmoud is in network with 2 carriers, including CMS Medicare and Molina. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
- CMS Medicare
- Molina
Source: Dmand AI Insurance Network Data
Sources for Guisou Mahmoud'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) |
| 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 Guisou Mahmoud
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Guisou Mahmoud's NPI number?
Guisou Mahmoud's NPI number is 1164435996. It was assigned on August 14, 2006, and it is active in the NPI Registry.
What does Guisou Mahmoud specialize in?
Guisou Mahmoud is an emergency medicine physician in Mission Viejo, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Guisou Mahmoud practice?
Guisou Mahmoud practices at 27700 Medical Center Rd, Mission Viejo, CA 92691. Guisou Mahmoud's primary practice is Mission Hospital - Unit in Mission Viejo, California. Dmand AI also links Guisou Mahmoud to 2 medical groups and 1 group practice or clinic.
What is Guisou Mahmoud's office phone number?
The practice phone on file for Guisou Mahmoud is (949) 365-2447.
What is Guisou Mahmoud's medical license number?
Guisou Mahmoud's California license number on file is A79774.
Which hospitals is Guisou Mahmoud affiliated with?
Guisou Mahmoud is affiliated with Providence Mission Hospital. Dmand AI links Guisou Mahmoud to 1 more hospital.
What medical group is Guisou Mahmoud part of?
Guisou Mahmoud is linked to Emergency Medicine Physicians. Dmand AI links Guisou Mahmoud to 2 more medical groups.
Does Guisou Mahmoud accept Medicare?
Yes. CMS data shows Guisou Mahmoud billed Medicare for 185 services in 2024, and Guisou Mahmoud accepts Medicare assignment.
How many Medicare patients does Guisou Mahmoud see?
CMS counts 133 Medicare patients who saw Guisou Mahmoud in 2024, with an average age of 75.
Is Guisou Mahmoud board certified?
Yes. Guisou Mahmoud is board certified in emergency medicine by the American Board of Emergency Medicine.
Show 6 more questionsShow fewer questions
What services does Guisou Mahmoud bill to Medicare?
In 2024, Guisou Mahmoud's most billed Medicare services were heart test or procedure (93010), emergency department visit (99285) and emergency department visit (99284).
Where did Guisou Mahmoud go to medical school?
Guisou Mahmoud graduated from St. George's University School of Medicine in 1998.
What drugs does Guisou Mahmoud prescribe most?
In 2024 Medicare Part D data, Guisou Mahmoud's most prescribed drugs by claims were Hydrocodone-Acetaminophen.
Has Guisou Mahmoud received payments from drug or device companies?
CMS Open Payments shows $396 in general payments to Guisou Mahmoud from 3 companies from 2016 to 2024. The largest total came from Ceribell, Inc.
How long has Guisou Mahmoud been practicing?
Guisou Mahmoud graduated from medical school in 1998, 28 years ago.
What insurance does Guisou Mahmoud accept?
Guisou Mahmoud is in network with 2 carriers, including CMS Medicare and Molina. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
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