ALFRED B JOHNSON MD
NPI 1174508865
Surgery in Merced, CA

NPI Status: Active since December 14, 2005

Contact Information

240 E 13TH ST STE C
MERCED, CA
ZIP 95341
Phone: (209) 723-2799
Fax: (209) 723-2984

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  • Individual
  • Male
  • Years of Experience 39
  • Surgery
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About ALFRED JOHNSON

This page provides the complete NPI Profile along with additional information for Alfred Johnson, a provider established in Merced, California with a medical specialization in Surgery and more than 39 years of experience. He graduated from Georgetown University School Of Medicine in 1987. The healthcare provider is registered in the NPI registry with number 1174508865 assigned on December 2005. The practitioner's primary taxonomy code is 208600000X with license number G88950 (CA). The provider is registered as an individual and his NPI record was last updated July 2025.

NPI
1174508865
Provider Name
ALFRED B JOHNSON MD
Gender
Male
Entity Type
Individual
Location Address
240 E 13TH ST STE C MERCED, CA 95341
Location Phone
(209) 723-2799
Location Fax
(209) 723-2984
Mailing Address
240 E 13TH ST STE C MERCED, CA 95341
Mailing Phone
(209) 723-2799
Mailing Fax
(209) 723-2984
Medical School Name
GEORGETOWN UNIVERSITY SCHOOL OF MEDICINE
Graduation Year
1987
Is Sole Proprietor?
Yes
Enumeration Date
12-14-2005
Last Update Date
07-21-2025
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A surgeon like Alfred Johnson treats injuries, diseases, and deformities through surgical operations. A surgeon could correct physical deformities, repair bone and tissue, or perform preventive or elective surgeries. Surgeons also examine patients, perform and interpret diagnostic tests, and provide counsel on preventive healthcare.

Location Map

Secondary Locations

  • 311 W I St
    Los Banos, CA 93635
    (209) 826-2222
  • 1549 Golden Gate Ave
    Dos Palos, CA 93620
    (209) 392-0022
  • 400 W I St
    Los Banos, CA 93635
    (209) 827-9999
  • 311 W I St # B
    Los Banos, CA 93635
    (209) 826-2222

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Surgery

Taxonomy Code
208600000X
Type
Allopathic & Osteopathic Physicians
License No.
G88950
License State
CA
Taxonomy Description
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1208600000XAllopathic & Osteopathic Physicians

Surgery

184876 (NY)
2208600000XAllopathic & Osteopathic Physicians

Surgery

42860 (GA)
3208600000XAllopathic & Osteopathic Physicians

Surgery

19035 (MS)

Medicare Participation & PECOS Enrollment Status

Alfred Johnson is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Alfred Johnson is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 3072575125

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20130207000182

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

This service was performed 21 times for 19 patients

Colonoscopy

A colonoscopy is a medical procedure that allows your doctor to examine your colon (the large intestine). It utilizes a thin, flexible tube with a tiny camera on the end, which is inserted through the rectum. This procedure can help identify issues such as polyps, inflammation, or early signs of cancer. It's usually recommended for people over 50 or those with specific risk factors.

This service was performed for 21 patients

Established patient office or other outpatient visit, 10-19 minutes

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.

This service was performed 26 times for 19 patients

Established patient office or other outpatient visit, 20-29 minutes

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.

This service was performed 19 times for 16 patients

Hernia repair - groin (open)

Hernia repair in the groin area (open) is a surgical procedure to fix a bulge or protrusion, caused by internal tissues pushing through a weak spot in your abdominal wall. In this operation, a small incision is made in the groin area. The protruding tissue is then placed back into the abdomen, and the weakened area is reinforced with stitches or a mesh.

This service was performed for 1-10 patients

Hernia repair (minimally invasive)

Hernia repair is a surgery to fix a hernia - a condition where an organ pushes through an opening in the muscle or tissue that holds it in place. Minimally invasive hernia repair involves small incisions, a tiny camera, and special surgical tools. This method often leads to quicker recovery, less pain, and reduced scarring compared to traditional surgery.

This service was performed for 1-10 patients

Initial hospital inpatient care per day, typically 50 minutes

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.

This service was performed 12 times for 12 patients

Initial hospital inpatient care per day, typically 70 minutes

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.

This service was performed 16 times for 16 patients

Insertion of non-tunneled central venous tube for infusion (5 years or older)

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.

This service was performed 14 times for 14 patients

New patient office or other outpatient visit, 15-29 minutes

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.

This service was performed 14 times for 14 patients

New patient office or other outpatient visit, 30-44 minutes

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.

This service was performed 21 times for 21 patients

Removal of gallbladder using an endoscope

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.

This service was performed 11 times for 11 patients

Repair of hernia of muscle at esophagus and stomach using an endoscope

This procedure fixes a hernia, an area where your stomach and esophagus muscles have weakened. Using an endoscope, a thin tube with a camera, the doctor can see and repair the hernia without large incisions, promoting quicker recovery.

This service was performed 20 times for 20 patients

Upper gastrointestinal (GI) endoscopy for acid reflux

An upper GI endoscopy is a procedure to examine your esophagus and stomach using a thin, flexible tube called an endoscope. It helps diagnose conditions like acid reflux by identifying any inflammation or damage. It's generally safe, performed under sedation, and takes about 15-30 minutes.

This service was performed for 56 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $22.58 for a new patient copayment and $18.29 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 95341 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99203

  • Average New Patient Price $90.32
  • Minimum New Patient Price $58.87
  • Maximum New Patient Price $176.6
  • Average New Patient Copayment $22.58
  • Minimum New Patient Copayment $14.71
  • Maximum New Patient Copayment $44.15

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99213

  • Average Established Patient Price $73.16
  • Minimum Established Patient Price $19.28
  • Maximum Established Patient Price $144.6
  • Average Established Patient Copayment $18.29
  • Minimum Established Patient Copayment $4.82
  • Maximum Established Patient Copayment $36.15

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

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NPI Validation Check Digit Calculation


The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
1174508865
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
2114410016812
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 1 + 1 + 4 + 4 + 1 + 0 + 0 + 1 + 6 + 8 + 1 + 2 + 24 = 55
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
60 - 55 = 55

The NPI number 1174508865 is valid because the calculated check digit 5 using the Luhn validation algorithm matches the last digit of the original NPI number.

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1174508865, enumerated in the NPI registry as an "individual" on December 14, 2005

The provider is located at 240 E 13th St Ste C Merced, Ca 95341 and the phone number is (209) 723-2799

The provider's speciality is Surgery with taxonomy code 208600000X

The provider has more than 39 years of experience. He graduated from Georgetown University School Of Medicine in 1987.

Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary the provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

Medicare beneficiaries should expect a typical cost of $90.32 with an average copayment of $22.58 for new patient appointments. Established patients should expect a typical charge of $73.16 and an average copayment of 18.29. Please review your insurance plan or contact the provider directly to determine your specific costs.

The most common procedures or services performed by this practitioner are: Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, Colonoscopy, Established patient office or other outpatient visit, 10-19 minutes, Established patient office or other outpatient visit, 20-29 minutes, Hernia repair - groin (open), Hernia repair (minimally invasive), Initial hospital inpatient care per day, typically 50 minutes, Initial hospital inpatient care per day, typically 70 minutes, Insertion of non-tunneled central venous tube for infusion (5 years or older), New patient office or other outpatient visit, 15-29 minutes, New patient office or other outpatient visit, 30-44 minutes, Removal of gallbladder using an endoscope, Repair of hernia of muscle at esophagus and stomach using an endoscope and Upper gastrointestinal (GI) endoscopy for acid reflux.

This NPI record was last updated on December 14, 2005. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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