DR. NICHOLAS N NISSEN M.D.
NPI 1174507099
Surgery - Surgical Critical Care in Los Angeles, CA

Q: What is Nicholas Nissen's NPI number?

The NPI number for Nicholas Nissen is 1174507099. It was assigned to this individual provider in the NPPES registry on December 5, 2005.

Q: What is Nicholas Nissen's specialty?

The primary specialty registered for this NPI is Surgery, specializing in Surgical Critical Care, with taxonomy code 2086S0102X.

Q: When was this NPI record last updated?

The NPPES record for Nicholas Nissen was last updated on August 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months 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.

Active since December 05, 2005PECOS EnrolledAccepts Medicare Assignment

87.67/100

CMS Quality Rating

127 S SAN VICENTE BLVD FL 7, LOS ANGELES, CA 90048(310) 423-6746(310) 423-7596 Get Directions Write a Review

NPPES record last updated: August 15, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 15, 2025, May 22, 2019 (2 updates tracked since 2019).

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About Dr. Nicholas N Nissen M.d. NPPES

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

DR. NICHOLAS N NISSEN M.D. (NPI 1174507099) is an individual surgical critical care provider in Los Angeles, California, licensed in California (G85301) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of University Of Minnesota Medical School (1987).

NPPES Registry Identity

NPI1174507099

Entity TypeIndividualMale

Primary Taxonomy2086S0102X

Provider Legal NameDR. NICHOLAS N NISSENCredential: M.D.

Location Address127 S SAN VICENTE BLVD FL 7Los Angeles, CA 90048-3311

Mailing Address4140 W 190th StTorrance, CA 90504-5513

Phone(310) 423-6746

Fax(310) 423-7596

Sole ProprietorNo

Medical School CMSUniversity Of Minnesota Medical SchoolGraduated 1987

Enumeration DateDecember 5, 2005

Last NPPES UpdateAugust 15, 20252 updates tracked since enumeration

NPPES CertifiedAugust 15, 2025

✔ NPI 1174507099 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtySurgery · Surgical Critical CareAllopathic & Osteopathic Physicians

Taxonomy Code2086S0102X

License✔ Licensed in CA · G85301

Definition

A surgeon with expertise in the management of the critically ill and postoperative patient, particularly the trauma victim, who specializes in critical care medicine 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.

Also ListedTransplant SurgeryTaxonomy 204F00000X · License G85301 (CA)

Also ListedSurgeryTaxonomy 208600000X · License G85301 (CA)

127 S SAN VICENTE BLVD FL 7, Los Angeles, CA 90048

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Secondary Practice Locations 2

Location 18700 BEVERLY BLVD.LOS ANGELES, CA 90048-1865 · Phone (310) 967-2641 · Fax (310) 967-1800

Location 28900 Beverly Blvd Fl 3West Hollywood, CA 90048-2438 · Phone (310) 423-2641 · Fax (310) 423-4552

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

Dr. Nicholas N Nissen 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 ID941340236

PECOS Enrollment IDI20091217000344

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

Medicare enrollment records show Nicholas Nissen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cedars-Sinai Medical Care Foundation

0.2 mi

Anesthesiology

8700 BEVERLY BLVD STE SB-290
Los Angeles, CA 90048

Reassigned Medicare billing, California enrollment
2,118 clinicians in this Medicare group

NPI 1043826720 (310) 423-1447

Cedars-Sinai Medical Center

0.2 mi

General Acute Care Hospital

8700 BEVERLY BLVD
Los Angeles, CA 90048

Reassigned Medicare billing, California enrollment
1,001 clinicians in this Medicare group

NPI 1639172372 (323) 866-8600

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 15

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.

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.

296 services72 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

261 services183 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

222 services67 patients

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

179 services65 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

155 services122 patients

New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more 99202

This service involves an initial visit to the doctor's office or other outpatient setting. It typically lasts between 15-29 minutes. The doctor will review your medical history, conduct a physical examination, and discuss your health concerns. It's a chance to establish your health baseline and address any immediate medical issues.

60 services60 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

59 services59 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

56 services54 patients

Other procedure on pancreas 48999

"Other procedures on the pancreas" refer to various surgical interventions not classified elsewhere. They may include removal of pancreatic stones, drainage of cysts, or treatment of certain pancreas-related disorders. These procedures aim to restore the normal function of the pancreas and mitigate symptoms.

36 services36 patients

Telephone medical discussion with physician, 21-30 minutes 99443

This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.

33 services32 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

31 services30 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

29 services29 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

21 services18 patients

Other procedure on liver using an endoscope 47379

This procedure involves using an endoscope, a flexible tube with a light and camera, to examine or treat your liver. It's a minimally invasive method that allows doctors to diagnose and manage liver conditions without major surgery.

14 services13 patients

Removal of gallbladder using an endoscope 47562

This procedure, known as endoscopic gallbladder removal, involves a surgeon using a special tool called an endoscope to remove your gallbladder through small incisions. It's typically done to treat gallstones and related complications. It's a less invasive method, often leading to quicker recovery.

14 services14 patients

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.

87.67/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

80.86

Promoting Interoperability

Improvement Activities

Cost

49.42

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

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