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MAHMOUD MOHAMAD ALI EL-SAYED M.D.
NPI 1982618856
Internal Medicine - Critical Care Medicine in Ballwin, MO

Active since July 28, 2006PECOS EnrolledAccepts Medicare Assignment
1409 THOMAS MASON PL, BALLWIN, MO 63011(314) 717-1717 Get Directions Write a Review

NPPES record last updated: December 21, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 21, 2021, Mar 7, 2018 (2 updates tracked since 2018).

About Mahmoud Mohamad Ali El-sayed M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MAHMOUD MOHAMAD ALI EL-SAYED M.D. (NPI 1982618856) is an individual critical care medicine provider in Ballwin, Missouri, licensed in Illinois (036.114709) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with St Josephs Hospital, and is a graduate of Other (1999).

NPPES Registry Identity

NPI1982618856
Entity TypeIndividualMale
Primary Taxonomy207RC0200X
Provider Legal NameMAHMOUD MOHAMAD ALI EL-SAYEDCredential: M.D.
Location Address1409 THOMAS MASON PLBallwin, MO 63011-4423
Mailing Address1409 Thomas Mason PlBallwin, MO 63011-4423 · (314) 717-1717
Phone(314) 717-1717
Sole ProprietorNo
Medical School CMSOtherGraduated 1999
Enumeration DateJuly 28, 2006
Last NPPES UpdateDecember 21, 20212 updates tracked since enumeration
NPPES CertifiedDecember 21, 2021
✔ NPI 1982618856 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Critical Care MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207RC0200X
License✔ Licensed in IL · 036.114709
Definition
An internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.
1409 THOMAS MASON PL, Ballwin, MO 63011
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Insurance Company.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mahmoud Mohamad Ali El-sayed M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID143225821
PECOS Enrollment IDI20160829002459
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show Mahmoud El-sayed reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Physician Specialists Of St Lukes LLC
3.4 mi
Internal Medicine
232 S WOODS MILL RD
Chesterfield, MO 63017
  • Reassigned Medicare billing, Missouri enrollment
  • 215 clinicians in this Medicare group
NPI 1235168410 (314) 434-1500
Cep America Illinois Intensivists
30 mi
Critical Care Medicine
1 SAINT ELIZABETH BLVD
O Fallon, IL 62269
  • Reassigned Medicare billing, Illinois enrollment
  • 99 clinicians in this Medicare group
NPI 1992204184 (618) 234-2120
Southeast Missouri Hospital Physicians, LLC
103 mi
Family Medicine
1701 LACEY ST
Cape Girardeau, MO 63701
  • Reassigned Medicare billing, Missouri enrollment
  • 470 clinicians in this Medicare group
NPI 1558311522 (573) 331-6880

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
185 services117 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
40 services38 patients
Insertion of non-tunneled central venous tube for infusion (5 years or older) 36556
This procedure involves placing a thin tube into a large vein, usually in the neck or chest, to administer medication or fluids. It's done under local anesthesia to minimize discomfort. It's a standard, safe procedure for individuals aged 5 and above.
11 services11 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

St Josephs Hospital

Acute Care Hospitals · Breese, IL
OwnershipVoluntary non-profit - Church
CMS Certification Number140145
Location9515 Holy Cross LnBreese, IL 62230 · Clinton County
Emergency services Birthing friendly

Hshs St Elizabeth's Hospital

Acute Care Hospitals · O Fallon, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140187
LocationOne St Elizabeth BoulevardO Fallon, IL 62269 · St. Clair County
Emergency services Birthing friendly

Ssm Health Saint Louis University Hospital

Acute Care Hospitals · Saint Louis, MO
1/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number260105
Location3635 Vista AveSaint Louis, MO 63110 · St. Louis City County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63011 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$128.28 typical visit price
range $55.65 – $169.38
Typical copayment $32.07 (range $13.91 – $42.34)
Most-billed visit code 99204
Established Patient
$98.37 typical visit price
range $17.76 – $137.92
Typical copayment $24.59 (range $4.44 – $34.48)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Care Plan
Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…
97%229 patients4/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mahmoud El-sayed's NPI number?

The NPI number for Mahmoud El-sayed is 1982618856. It was assigned to this individual provider in the NPPES registry on July 28, 2006.

Where is Mahmoud El-sayed located?

Mahmoud El-sayed practices at 1409 Thomas Mason Pl, Ballwin, MO 63011. The listed phone number is (314) 717-1717.

What is Mahmoud El-sayed's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.

Is Mahmoud El-sayed enrolled in Medicare?

Yes. Mahmoud El-sayed is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Mahmoud El-sayed's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mahmoud El-sayed reassigns Medicare benefits to 3 organizations: Physician Specialists Of St Lukes LLC (Chesterfield, MO), Cep America Illinois Intensivists (O Fallon, IL) and Southeast Missouri Hospital Physicians, LLC (Cape Girardeau, MO). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mahmoud El-sayed's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mahmoud El-sayed accept?

Health plans from Oscar Insurance Company list Mahmoud El-sayed as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Mahmoud El-sayed affiliated with any hospitals?

According to CMS data, Mahmoud El-sayed is affiliated with St Josephs Hospital, Hshs St Elizabeth's Hospital and Ssm Health Saint Louis University Hospital.

When was this NPI record last updated?

The NPPES record for Mahmoud El-sayed was last updated on December 21, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.